Training Manual A319 / A320 / A321 ATA 71-80 ENGINE

Training Manual A319 / A320 / A321 ATA 71-80 ENGINE
Training Manual
A319 / A320 / A321
ATA 71-80
ENGINE CFM56-5A
ATA 30-21
AIR INTAKE ICE PROTECTION
LEVEL 3
PART-2
Book No:
A319/320/321 71-80CFM L3 e
30.05.1995
Lufthansa
Technical Training GmbH
Lufthansa Base
Issue: July 1999
For Training Purposes Only
© Lufthansa 1995
For training purpose and internal use only.
Copyright by Lufthansa Technical Training GmbH.
All rights reserved. No parts of this training
manual may be sold or reproduced in any form
without permission of:
Lufthansa Technical Training GmbH
Lufthansa Base Frankfurt
D-60546 Frankfurt/Main
Tel. +49 69 / 696 41 78
Fax +49 69 / 696 63 84
Lufthansa Base Hamburg
Weg beim Jäger 193
D-22335 Hamburg
Tel. +49 40 / 5070 24 13
Fax +49 40 / 5070 47 46
TABLE OF CONTENTS
ATA 71 POWER PLANT . . . . . . . . . . . . . . . . . . . . . .
71-00
1
FAN BLADE REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . .
SPINNER FRONT / REAR CONE REM./INST. . . . . . . . .
AMM FAN BLADE REMOVAL / INSTALLATION . . . . . . .
AMM FAN BLADE REMOVAL / INSTALLATION . . . . . . .
INDIVIDUAL FAN BLADE REPLACEMENT: . . . . . . . . . .
30
32
34
36
38
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFM 56 CONCEPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFM 56-5 FAMILY MODELS . . . . . . . . . . . . . . . . . . . . . . . .
1
1
2
ATA 73 ENGINE FUEL AND CONTROL . . . . . . . . . . . . . . . . . . . . . . .
4
72-30
ATA 75 AIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFM 56-5A1 ENGINE DATA ( LUFTHANSA CONFIG ) .
4
5
HP-COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP COMPRESSOR STATOR ASSEMBLY . . . . . . . . . . . .
40
42
72-40
71-00
6
COMBUSTION SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMBUSTION SECTION DESCRIPTION . . . . . . . . . . . .
HIGH PRESSURE TURBINE . . . . . . . . . . . . . . . . . . . . . . . .
44
44
44
72-50
TURBINE SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LPT ROTOR & STATOR MODULE . . . . . . . . . . . . . . . . . . .
TURBINE FRAME MODULE . . . . . . . . . . . . . . . . . . . . . . . .
46
46
48
72-60
ACCESSORY DRIVE SECTION . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORY GEARBOX . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORY GEARBOX SEALS . . . . . . . . . . . . . . . . . . . .
50
50
52
72-21
BORESCOPE INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . .
BORESCOPE PORTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP COMPRESSOR SPECIAL BORESCOPE PLUGS . .
N2 ROTOR ROTATION PAD COVER . . . . . . . . . . . . . . . .
54
54
56
58
71-20
ENGINE MOUNTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FWD MOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AFT MOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60
60
62
62
ENGINE HAZARD AREAS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ATA 73 ENGINE FUEL AND CONTROL . . . . . . . .
73-20
ATA 77
77-00
FADEC GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC PRESENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE CONTROL P/B’S AND SWITCHES . . . . . . . . . .
8
8
10
12
INDICATING . . . . . . . . . . . . . . . . . . . . . . . . .
16
ENGINE INDICATING PRESENTATION . . . . . . . . . . . . . . . .
INDICATION GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
16
ATA 72 ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
72-00
72-21
8
22
GENERAL ARANGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE MODULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE MAIN BEARINGS . . . . . . . . . . . . . . . . . . . . . . . . .
FRAMES AND CASES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE FLANGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAN FRAME ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . .
RADIAL STRUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
22
22
24
24
28
28
FAN ROTOR BLADES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
ATA 71 POWER PLANT . . . . . . . . . . . . . . . . . . . . . .
71-10
64
NACELLE ACCESS DOORS & OPENINGS . . . . . . . . . . . .
NACELLE GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESS DOORS & OPENINGS . . . . . . . . . . . . . . . . . . . .
FAN COWLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAN COWL OPENING / CLOSING . . . . . . . . . . . . . . . . . . .
FAN COWL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . .
64
64
64
66
68
70
Page: i
TABLE OF CONTENTS
ATA 78 EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . .
78-30
REVERSER COWL DOORS . . . . . . . . . . . . . . . . . . . . . . . . . .
THRUST REVERSER COWL ADJUSTMENT . . . . . . . . .
ATA 79 OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
72
72
76
78
78
79-30
0IL INDICATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEMPERATUR ENGINE OIL (TEO) . . . . . . . . . . . . . . . . . .
OIL PRESSURE INDICATION . . . . . . . . . . . . . . . . . . . . . . .
OIL FILTER DIFFERENTIAL PRESSURE SWITCH . . . .
OIL TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . . . . .
OIL QUANTITY TRANSMITTER . . . . . . . . . . . . . . . . . . . . .
LOW OIL PRESSURE SWITCHING . . . . . . . . . . . . . . . . . .
80
80
82
82
82
82
82
82
79-00
OIL SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . .
OIL TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE OIL SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . .
LUBRICATION UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHIP DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAIN FUEL OIL HEAT EXCHANGER . . . . . . . . . . . . . . . .
SERVO FUEL HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84
84
84
86
88
90
90
0IL INDICATING COMPONENTS . . . . . . . . . . . . . . . . . . . . . .
OIL PRESSURE TRANSMITTER . . . . . . . . . . . . . . . . . . . .
LOW OIL PRESSURE SWITCH . . . . . . . . . . . . . . . . . . . . .
OIL QUANTITY TRANSMITTER . . . . . . . . . . . . . . . . . . . . .
TEMPERATUR ENGINE OIL (TEO) . . . . . . . . . . . . . . . . . .
OIL FILTER DIFFERENTIAL PRESSURE SWITCH . . . .
OIL TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . . . . .
92
92
92
94
94
96
96
98
73-00
FUEL SYSTEM PRESENTATION . . . . . . . . . . . . . . . . . . . . . .
ENGINE FUEL SYSTEM DESCRIPTION . . . . . . . . . . . . .
98
98
73-10
FUEL DISTRIBUTION COMPONENTS . . . . . . . . . . . . . . . . .
FUEL PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL FILTER DIFF PRESSURE SW. . . . . . . . . . . . . . . . .
HYDROMECHANICAL CONTROL UNIT . . . . . . . . . . . . . .
FUEL METERING OPERATION . . . . . . . . . . . . . . . . . . . . .
HP & LP FUEL SOV CONTROL . . . . . . . . . . . . . . . . . . . . .
LOW PRESSURE FUEL SHUT OFF VALVE . . . . . . . . . .
FUEL RETURN SYSTEM COMPONENTS . . . . . . . . . . . .
FUEL RETURN VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL RETURN VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDG FUEL COOLED OIL COOLER . . . . . . . . . . . . . . . . . .
BURNER STAGING VALVE . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL NOZZLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL MANIFOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100
100
102
102
104
106
108
110
112
112
114
116
118
120
120
73-30
ENGINE FUEL INDICATING . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL FLOW TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . .
122
122
78
79 - 00 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYSTEM PRESENTATION . . . . . . . . . . . . . . . . . . . . . . . . .
79-30
ATA 73 ENGINE FUEL AND CONTROL . . . . . . . .
ATA 71 POWER PLANT . . . . . . . . . . . . . . . . . . . . . . 126
71-70
DRAINS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PYLON AND ENGINE DRAINS . . . . . . . . . . . . . . . . . . . . . .
DRAIN MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PYLON DRAINS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
126
126
126
132
ATA 76 ENGINE CONTROLS . . . . . . . . . . . . . . . . . 134
THROTTLE CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . .
THRUST LEVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
134
134
Page: ii
TABLE OF CONTENTS
BUMP RATING PUSH BUTTON . . . . . . . . . . . . . . . . . . . . .
ARTIFICIAL FEEL UNIT(MECANICAL BOX) . . . . . . . . . .
THROTTLE CONTROL UNIT . . . . . . . . . . . . . . . . . . . . . . .
RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIDS ALPHA CALL UP OF TLA . . . . . . . . . . . . . . . . . . . . .
ATA 77
136
138
140
142
144
ENGINE INDICATING . . . . . . . . . . . . . . . . 146
T25 SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STUDENT NOTES: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
176
176
180
73-20
ECU DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECU SOFTWARE MAIN FUNCTIONS . . . . . . . . . . . . . . . .
ECU CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDENTIFICATION CONNECTOR (J14) . . . . . . . . . . . . . . .
182
182
182
182
73-20
77-00
ENGINE INDICATING GENERAL . . . . . . . . . . . . . . . . . . . . . .
ECAM UPPER DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECAM LOWER DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . .
146
146
146
FADEC POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTROL ALTERNATOR . . . . . . . . . . . . . . . . . . . . . . . . . .
184
184
186
73-20
77-10
POWER INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N1 INDICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . .
N2 INDICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . .
148
148
150
POWER MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDLE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
188
188
190
73-20
77-20
TEMPERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EGT INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
152
152
FADEC TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFDS SYSTEM REPORT/TEST FADEC 1 (2) . . . . . . . . .
CFDS SYSTEM REPORT/TEST FADEC 1 (2) . . . . . . . . .
192
192
194
ATA31
INDICATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAX POINTER RESET ( N1, N2 & EGT ) . . . . . . . . . . . . .
156
156
73-25
77-30
ANALYZERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE VIBRATION MONITORING UNIT ( EVMU ) . . .
VIBRATION INDICATION . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFDS INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFDS INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
158
160
160
162
164
ENGINE INTERFACE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . .
EIU PRESENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EIU INPUT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . .
EIU INTERFACES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EIU INTERFACES CONT. . . . . . . . . . . . . . . . . . . . . . . . . . .
196
196
196
198
198
73-25
EIU CFDS TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFDS SYSTEM REPORT/TEST EIU . . . . . . . . . . . . . . . . .
202
202
CONTROLLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC LRU‘S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC LRU‘S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
166
166
168
168
170
ENGINE SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FADEC SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T12 SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PS13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P0 SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
172
172
174
174
174
73-20
73-20
ATA 75 ENGINE AIR . . . . . . . . . . . . . . . . . . . . . . . . . 204
75-20
ENGINE CLEARANCE CONTROL SYSTEMS, . . . . . . . . . .
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ROTOR ACTIVE CLEARANCE CONTROL SYSTEM . . .
ROTOR ACTIVE CLEARANCE CONTROL VALVE . . . . .
HP TURBINE CLEARANCE CONTROL SYSTEM . . . . . .
HPT CLEARANCE VALVE . . . . . . . . . . . . . . . . . . . . . . . . . .
LPTCC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
204
204
206
206
208
210
212
Page: iii
TABLE OF CONTENTS
75-30
75-40
LPT CLEARANCE CONTROL VALVE . . . . . . . . . . . . . . . .
214
COMPRESSOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . .
VARIABLE BLEED VALVE SYSTEM . . . . . . . . . . . . . . . . .
VBV SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VBV SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . .
VBV DOORS & FLEX SHAFTS . . . . . . . . . . . . . . . . . . . . . .
VBV POSITION SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . .
VARIABLE STATOR VANES . . . . . . . . . . . . . . . . . . . . . . . .
NACELLE COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
216
216
218
220
222
224
226
228
NACELLE TEMPERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . .
NACELLE TEMPERATURE GENERAL . . . . . . . . . . . . . . .
230
230
MANUAL START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ATA 78 EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
78-30
THRUST REVERSER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THRUST REVERSER CONTROL . . . . . . . . . . . . . . . . . . . .
THRUST REVERSER COMPONENTS (LRU ’S ) . . . . . .
HCU LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REVERSER HYDRAULIC CONTROL UNIT . . . . . . . . . . .
REVERSER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . .
LATCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HYDRAULIC ACTUATOR . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOW SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEPLOY SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
256
256
258
260
260
262
264
266
268
270
272
78-37
THRUST REVERSER IDEPENDENT LOCKING SYSTEM
”THIRD LINE OF DEFENCE” . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . .
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THRUST REVERSER DEACTIVATION . . . . . . . . . . . . . . .
MANUAL DEPLOYMENT OF THE BLOCKER DOOR . .
OPERATIONAL TEST OF THE T/R WITH CFDS . . . . . .
274
274
274
274
276
278
280
71-00
ENGINE CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE REMOVAL / INSTALLATION . . . . . . . . . . . . . . . .
STUDENT NOTES: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
282
282
284
ATA 74 IGNITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
74-00
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTROL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IGNITION SYSTEM COMPONENTS . . . . . . . . . . . . . . . . .
HIGH TENSION LEADS COOLING . . . . . . . . . . . . . . . . . .
IGNITION TEST WITH CFDS . . . . . . . . . . . . . . . . . . . . . . .
IGNITION TEST WITHOUT CFDS . . . . . . . . . . . . . . . . . . .
232
232
232
234
236
238
240
242
ATA 80 STARTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
80-00
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR STARTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTER AIR VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTER VALVE MANUAL OPERATION . . . . . . . . . . . . .
CRANKING-DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . .
WET CRANKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUTOMATIC START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UNSATISFACTORY STARTS DURING AUTO START . .
244
246
246
246
248
250
252
252
254
ATA 30 ICE AND RAIN PROTECTION . . . . . . . . . . 286
30-20
AIR INTAKE ANTI-ICE PROTECTION . . . . . . . . . . . . . . . . .
ENGINE AIR INTAKE ANTI-ICE SYST
EMPRESENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE NACELLE ANTI ICE VALVE OVERRIDE . . . . .
286
STUDENT RESPONSE QUESTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .
292
286
290
Page: iv
TABLE OF CONTENTS
SELF EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
292
Page: v
Lufthansa Technical Training
POWER PLANT
GENERAL
A319/A320
CFM 56-5A
71-00
ATA 71
POWER PLANT
71-00
INTRODUCTION
CFM 56 CONCEPT
The CFM 56 turbofan engine family is a product of CFMI (Comercial Fan Motor
International). CFM International is a company jointly owned by ”General Electric” of the USA and ”Societe Nationale d‘Etude et de Construction de Moteurs
d‘Aviation” (SNECMA) of France.
- Core Engine
- Fuel System Design
- E.C.U. & H.M.U.
For Training Purposes Only
- L.P. System
- Accessory Drive System
- Control & Accessories
- Engine Installation
- Thrust Reverser
FRA US/T Bu
July 99
Page: 1
Lufthansa Technical Training
POWER PLANT
GENERAL
A319/A320
CFM 56-5A
71-00
CFM 56-5 FAMILY MODELS
Family Models
CFM
56-5A1
CFM
56-5A3
CFM
56-5A4
CFM
56-5A5
CFM
56-5B1
CFM
56-5B2
CFM
56-5B4
CFM
56-5B5
CFM
56-5B6
A320
A320
A319
A319
A321
A321
A320
A319
A319
THRUST
25000 lb
26500 lb
22000 lb
23500 lb
30000 lb
31000 lb
27000 lb
22000 lb
23500 lb
FLAT RATED TEMPERATURE ( DEG C / DEG F )
30°/86°
30°/86°
30°/86°
30°/86°
30°/86°
30°/86°
45°/113°
45°/113°
45°/113°
6:1
6:1
6.2 :1
6.2 : 1
5.5 : 1
5.5 : 1
5.7 : 1
6:1
5.9 : 1
AIRCRAFT TYPE
BYPASS RATIO
852lb/sec 876lb/sec 816lb/sec 842lb/sec 943lb/sec 956lb/sec 897lb/sec 818lb/sec 844lb/sec
MASS FLOW
31.3
31.3
35.5
35.5
32.6
32.6
32.6
890°/915°
915°
950°
950°
950°
950°
950°
N1 ( RPM )
5100
5100
5100
5100
5200
5200
5200
5200
5200
N2 ( RPM )
15183
15183
15183
15183
15183
15183
15183
15183
15183
CFM
56-5A1
CFM
56-5A3
CFM
56-5A4
CFM
56-5A5
CFM
56-5B1
CFM
56-5B2
CFM
56-5B4
CFM
56-5B5
CFM
56-5B6
LENGTH ( INCH )
95,4
95,4
95,4
95,4
102,4
102,4
102,4
102,4
102,4
FAN DIAMETER ( INCH )
68,3
68,3
68,3
68,3
68,3
68,3
68,3
68,3
68,3
BASIC DRY WEIGHT ( lb )
4995
4995
4995
4995
5250
5250
5250
5250
5250
1+3+9
1+3+9
1+3+9
1+3+9
1+4+9
1+4+9
1+4+9
1+4+9
1+4+9
1+4
1+4
1+4
1+4
1+4
1+4
1+4
1+4
1+4
OVERALL PRESS. RATIO
EGT ( DEG C )
31.3
31.3
890°/915° 890°/915°
ENGINE CHARACTERISTICS
For Training Purposes Only
Family Models
FAN / LP / HP STAGE
NUMBERS
HP / LP TURBINE STAGE
NUMBERS
FRA US/T Bu
July 99
Page: 2
A319/A320
CFM 56-5A
71-00
For Training Purposes Only
Lufthansa Technical Training
POWER PLANT
GENERAL
Figure 1
FRA US/T Bu
July 99
CFM 56 -5
Page: 3
Lufthansa Technical Training
POWER PLANT
GENERAL
A319/A320
CFM 56-5A
71-00
DIFFERENCES CFM 56-5A1 /5A5
FLAT RATED THRUST RATING
The Engine CFM 56-5A5 is prepared for dual thrust-rating.
Basic rating is 23500 lbs with FLEX rating to max. climb thrust.
Alternate rating is 22000 lbs, no FLEX rating.
The selection of the thrust rating can be done via MCDU.
( lb )
The letter ”D” near to the N1 indication on the EWD indicates, that the
alternate rating is selected ( as soon as the ECU is powered ).
25000
Engine Commonality
20000
After the embodiment of some CFMI service bulletin‘s, a upgrading of the
CFM56-5A1 ( A320 standard ) to the CFM56-5A5 ( A319 standard ) is possible. See also ” ECU intermix”.
15000
ATA 73
10000
ENGINE FUEL AND CONTROL
ECU intermix A320 / A319.
When the ECU software P25 ( P26 ) is installed the ECU‘s are interchangeable.
For Training Purposes Only
THRUST
ATA 75
AIR
Rotor Active Clearence Control System ( RACC ).
ECU Cooling System.
Both systems are not installed on the A319.
FRA US/T Bu
July 99
MAX. TAKE OFF 25000 lbs
MAX. CONTINOUS 23700 lbs
THRUST
N1
EGT
30
5000
AMBIENT TEMP. ( C )
SEA LEVEL STATIC ( 1013 hPa )
-10
0
10
20
30
40
AMBIENT TEMP. ( C )
Page: 4
Lufthansa Technical Training
POWER PLANT
GENERAL
A319/A320
CFM 56-5A
71-00
CFM 56-5A1 ENGINE DATA ( LUFTHANSA CONFIG )
Take OFF Thrust (Sea Level Static) Time Limit 5 min:
Flat Rated Ambient Temperature
Max Continous (Sea Level Static)
Flat Rated Ambient Temperaturen
Airflow ( Take off )
=
=
=
=
11120 daN
30C
10500 daN
25C
852 lbs/sec = 426 kg/sec
By - Pass Ratio
6 : 1
Compressor Pressure Ratio (overall,Take Off, SLS )
26,5 : 1
Fan Pressure Ratio ( Take Off, SLS )
1,55 : 1
Fan Thrust / Core Thrust (At Take Off )
Turbine Inlet Temperature (T41) (Take Off -Hot Day )
EGT (T49,5)
RED LINE
MAX CONTINOUS
ENG. START
N1 & N2 Direction of Rotation
For Training Purposes Only
25000 lbs
86
23700 lbs
77F
80% / 20%
2311F = 1265C
890C
855C
725C
Clockwise (aft looking forward)
N1 Design Speed
N1 MAX.
100%
102%
5000 min -1
5100 min -1
N2 Design Speed
N2 MAX.
100%
105%
14460 min -1
15183 min -1
TSFC (Standart, Static )
Take Off
MAX. Contious
75%
TSFC ( MACH 0,8 )
Altitude 35000 ft, Std. Day
Engine Weight
FRA US/T Bu
0,343 lbs/lbs x h
0,339 lbs/lbs x h
0,326 lbs/lbs x h
0,596 lbs/lbs x h
4734 lbs = 2150 Kg
July 99
Page: 5
71-00
A319/A320/A321
CFM 56-5
71-00
ENGINE HAZARD AREAS
For Training Purposes Only
Lufthansa Technical Training
ENGINE
HAZARD AREAS
FRA US/T Bu
July1999
Page: 6
A319/A320/A321
CFM 56-5
71-00
For Training Purposes Only
Lufthansa Technical Training
ENGINE
HAZARD AREAS
Figure 2
FRA US/T Bu
July1999
Engine Hazard Areas
Page: 7
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
ATA 73
ENGINE FUEL AND CONTROL
73-20
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
FADEC PRESENTATION
FADEC : Full Authority Digital Engine Control.
For Training Purposes Only
GENERAL
The Full Authority Digital Electronic Control (FADEC) system provides full
range control of the engine to achieve steady state and transient performance
when operated in combination with aircraft subsystems.
The engine control is built around a Full Authority Digital Engine Control system, which serves as an interface between the aircraft and the engine control
and monitoring components.
The FADEC system of each engine consists of a dual channel Electronic Control Unit (ECU), with its associated peripherals.
ECU : Electronic Control Unit.
NOTE:
There are no adjustments possible on the FADEC system
(e.g.Idle,Part Power etc.)
FRA US/T Bu
July 1999
Page: 8
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
P 0 T4.9 T25
FMV
FEED
BACK
T12 PS12 PS3 T3
(EGT)
N1
T-CASE
N2
TEO
IGN B
IGN A
THRUST
LEVER
ANALOG &
DISCRETE
SIGNALS
28 V DC
115 V
400 HZ
A
ÇÇ
ÇÇ
Ignition
Boxes
B
Thrust Reverser
ECU ALTERNATOR
TRUST CONTROL
UNIT
CFM 56-5A
RESOLVER
IGNITORS
HYDRAULIC
PRESS
FUEL PRESS
FUEL FLOW
For Training Purposes Only
HMU
ECU
TO
BURNERS
FEEDBACK
( CH: A & B )
FEEDBACK
Return Fuel to AC Tank
HCU
FUEL RETURN
VALVE
FOR ENGINE TREND MONITORING
T/R REVERSER Stow / Deploy Feedback
FUEL
FLOW
P25
Ps13
T5
T/R REVERSER Stow / Deploy Command
Figure 3
FRA US/T Bu
July 1999
FADEC Presentation CFM 56-5A
Page: 9
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
CFM56-5A
73-20
FADEC FUNCTIONS
Full Authority Digital Engine Control ( FADEC )
The FADEC consists of the Engine Control Unit ( ECU ), Hydromachanical Unit
( HMU ) and its peripheral components and sensors used for control and monitoring.
FADEC Definition
Each engine is equipped with a duplicated FADEC system. The FADEC acts as
a propulsion system data multiplexer making engine data available for condition
monitoring.
For Training Purposes Only
A319/A320/A321
FADEC Controls
The FADEC provides the engine sytem regulation and scheduling to control the
thrust and optimize the engine opration.
The FADEC provides:
- Fuel control regulation
- power management
- gas generator control
- Turbine active clearance control
- flight deck indication data
- Engine maintenance data
- Contitioning monitoring data
- engine limit protection
- thrust reverse control
- feedback
- automatic engine starting
- Fuel return control for IDG cooling
Power Management
The FADEC provides automatic engine thrust control and thrust parameters
limits computation.
The FADEC manages power according to two thrust modes:
- manual mode depending on thrust lever angle ( TLA )
- Autothrust mode depending on autothrust function generated by the auto
flight system ( AFS ).
FRA US/T Bu
July 1999
The FADEC also provides two idle mode selections:
- Approach Idle: it is obtained when slats are extended in FLT.
- Minimum Idle: it can be modulated up to approach idle depending on:
Air conditioning demand
Engine anti ice demand
Wing anti ice demand
Temperature Engine Oil ( TEO for IDG cooling ).
Engine Limit Protection
The FADEC provides overspeed protection for N1 and N2, in order to prevent
engine exceeding certified limits, and also monitors the EGT.
Engine Systems Control
The FADEC provides optimal engine operation by controlling the:
- Fuel Flow
- Compressor air flow and turbine clearence.
Thrust Reverse
The FADEC supervises entirely the thrust reverse operation.
In case of a malfunction, the thrust reverser is stowed.
Start and Ignition Control
The FADEC controls the engine start sequence. It monitors N1, N2 and EGT
parameters and can abort or recycle an engine start.
Power Supply
The FADEC system is self-powered by a dedicated permanent magnet alternator when N2 is above 15%, and is powered by the aircraft for starting, as a
backup and for testing with engine not running.
Page: 10
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
P 0 T4.9 T25
FMV
FEED
BACK
T12 PS12 PS3 T3
(EGT)
N1
T-CASE
N2
TEO
IGN B
IGN A
THRUST
LEVER
ANALOG &
DISCRETE
SIGNALS
28 V DC
115 V
400 HZ
A
ÇÇ
ÇÇ
Ignition
Boxes
B
Thrust Reverser
ECU ALTERNATOR
TRUST CONTROL
UNIT
CFM 56-5A
RESOLVER
IGNITORS
HYDRAULIC
PRESS
FUEL PRESS
FUEL FLOW
For Training Purposes Only
HMU
ECU
TO
BURNERS
FEEDBACK
( CH: A & B )
FEEDBACK
Return Fuel to AC Tank
HCU
FUEL RETURN
VALVE
FOR ENGINE TREND MONITORING
T/R REVERSER Stow / Deploy Feedback
FUEL
FLOW
P25
Ps13
T5
T/R REVERSER Stow / Deploy Command
Figure 4
FRA US/T Bu
July 1999
FADEC Presentation CFM 56-5A
Page: 11
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
ENGINE CONTROL P/B’S AND SWITCHES
Engine Mode Selector
Position CRANK :
- selects FADEC power.
- allows dry and wet motoring (ignition is not availiable).
Position IGNITION / START :
- selects FADEC power
- allows engine starting (manual and auto).
Position NORM :
- FADEC power selected OFF( Engine not running )
Manual Start P/B
- controls the start valve (when the mode selector is in IGNITION / START
or CRANK position).
FADEC GND PWR P/B
Position ON :
- selects FADEC power
Engine Master Lever
Position OFF :
- closes the HP fuel valve in the HMU and the LP fuel valve.
- resets the ECU
Position ON :
- starts the engine in automatic mode (when the mode selector is in IGNITION / START ).
- selects fuel and ignition on during manual start procedure.
For Training Purposes Only
- opens the LP-fuel valve and deenergizes the HP-fuel shut-off valve in
the HMU.
FRA US/T Bu
July 1999
Page: 12
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
A
CENTRAL PEDESTAL 115VU
NORM
B
MAINTENANCE PANEL 50VU
OVERHEAD PANEL 22VU
For Training Purposes Only
C
Figure 5
FRA US/T Bu
July 1999
Engine Control P/B‘s and Switches
Page: 13
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
For Training Purposes Only
49VU
2450000HMQ0
Figure 6
FRA US/T Bu
July 1999
Engine Circuit Breakers
Page: 14
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC GENERAL
A319/A320/A321
CFM56-5A
73-20
121VU
ANTI ICE
122VU
For Training Purposes Only
2450000VAQ0
2450000UMR0
Figure 7
FRA US/T Bu
July 1999
Engine Circuit Breakers
Page: 15
Lufthansa Technical Training
Engine Indicating
ECAM
ATA 77
77-00
CFM 56-5A
77-00
INDICATING
ENGINE INDICATING PRESENTATION
INDICATION GENERAL
Primary Engine Display
The primary engine parameters listed below are permanently displayed on the
Engine and Warning display ( E / WD ) :
N1 ( low rotor speed )
Exhaust Gas Temperature ( EGT )
N2 ( high rotor speed )
FF ( fuel flow )
After 5 min of the power up test the indication is displayed in amber and figures
are crossed ( XX ). Normal indication can be achieved by using the FADEC
GRD power switches, one for each engine at the maintenace panel or by the
MODE selector switch on on the Engine panel at the pedestal in CRANK or
IGN / START position for both engine.
If a failure occurs on any indication displayed, the indication is replaced by amber crosses, the analog indicator and the marks on the circle disappear, the
circle becomes amber.
Only in case of certain system faults and flight phases a warning message appears on the Engine Warning Display.
For Training Purposes Only
A319 / A320 / A321
OIL temperature
For further info see ATA 79
Starter valve positions, the starter duct pressure and during eng start up,
that operating Ignition system ( ONLY ON ENGINE START PAGE )
In case of high nacelle temperature a indication is provided below the engine oil temp. indication.
Engine Vibration - of N1 and N2
As warnings by system problems only :
- OIL FILTER CLOG
- FUEL FILTER CLOG
Some engine parameters also displayed on the CRUISE page:
F USED
OIL QT
VIB ( N1 + N2 )
Secondary Engine Display
The lower display shows the secondary engine parameters listed below. The
engine page is available for display by command, manually or automatically
during engine start or in case of system fault :
Total FUEL USED
For further info see ATA 73
OIL quantity
For further info see ATA 79
OIL pressure
For further info see ATA 79
FRA US/T Bu July 1999
Page: Page: 16
Lufthansa Technical Training
Engine Indicating
ECAM
A319 / A320 / A321
CFM 56-5A
77-00
10
5
UPPER ENG.
ECAM DISPLAY
UNIT
70.4
5
10
670
99.8
For Training Purposes Only
LOWER ENG.
ECAM DISPLAY
UNIT
0950
240
nac
c
240
70.4
EGT
c
N2
%
F.F
10
670
99.9
FLX 84.6%35°C
FOB: 3600 KG
S FLAP F
0980
2
ENGINE
F.USED
VIB
Kg
1300
1250
0.8
OIL
VIB
20 qt
20
1.2
.5
.4
11
11
0
0
100
0 42 psi 0 44
c
20
20
IGN
A B
34 PSI
PSI 35
Figure 8
FRA US/T Bu July 1999
10
5
5
Kg/h
100
NAC temp. indication:
N1
%
N1
0.9
N2
1.3
OIL FILTER
CLOG
CLOG
F. FILTER
CLOG
CLOG
Engine ECAM Displays
Page: Page: 17
Lufthansa Technical Training
ENGINE
STATIONS
A319/A320/321
CFM56-5A
72-00
STAGE NUMBERING CFM56-5A
STAGES :
COMPONENT :
STAGE NUMBER :
NOTES :
1
FAN
1
Fan air used for ACC
1
2
3
LOW PRESSURE
COMPRESSOR (BOOSTER)
1
2
3
VBV
HIGH PRESSURE
COMPRESSOR
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
COMBUSTION CHAMBER
HIGH PRESSURE
TURBINE
For Training Purposes Only
1
1
2
3
4
LOW PRESSURE
TURBINE
VSV ( & IGV )
VSV
VSV
VSV
CUST. BLEED, Eng. Anti Ice (A/I)
CUST. BLEED Muscle Press A/I
Start Bleed
20 Fuel Nozzles,2 Ignitor Plugs
1
1
2
3
4
ACTIVE CLEARANCE CONTROL
ACTIVE CLEARANCE CONTROL
EXHAUST NOZZLE
FRA US-E Bu
July 99
Page: 18
A319/A320/321
CFM56-5A
72-00
1 FAN STAGE
3 BOOSTER STAGES
For Training Purposes Only
Lufthansa Technical Training
ENGINE
STATIONS
ACCESSORY
GEARBOX
July 99
COMBUSTOR
1STAGE
HP TURBINE
TRANSFER
GEARBOX
Figure 9
FRA US-E Bu
9 STAGE
HP COMPRESSOR
TURBINE
FRAME
4 STAGE
LP TURBINE
Engine Stages
Page: 19
Lufthansa Technical Training
For Training Purposes Only
ENGINE
STATIONS
A319/A320/321
CFM56-5A
72-00
ENGINE STATIONS CFM 56-5A
AERODYNAMIC STATION :
STATION LOCATION :
0
AMBIENT
10
INTAKE / ENGINE INLET INTERFACE
12
FAN INLET
T12 = Fan ( Booster Inlet Temp.) used for FADEC.
P12 = Fan ( Booster) Inlet Press. (PT2) used for
FADEC.
13
FAN EXIT
PS13 = Static Pressure of Fan Bypass Air Flow
used for Monitoring.
25
L.P. COMPRESSOR (BOOSTER EXIT)
T25 = High Pressure Compressor Inlet Temp. (CIT)
used for FADEC.P25 = High Pressure Compressor
Inlet Press. used for FADEC
30
H.P. COMPRESSOR
T3 = High Pressure Compressor Discharge Temp.
(CDT) PS3 = Compressor Discharge Pressure (
CDP ) used for FADEC
40
COMBUSTION SECTION EXIT
42
H.P. TURBINE EXIT
T case = HPT Shroud Support Temperature used for
HPT Active Clearance Control
49
L.P. TURBINE STAGE 2 INLET
T49.5 = Exhaust Gas Temp. (EGT) used for Cockpit
Indication.
50
EXHAUST
T5 = Total Temp. Turbine Rear Frame Plane used
for Monitoring.
Flowpath aerodynamic stations have been established to facilitate engine performance assessment and monitoring.
As the CFM 56-5 is a high bypass engine,its airflow path features a primary
and a secondary airflow.
FRA US-E Bu
STATION USED FOR:
July 99
P0 = Ambient Static Pressure used for FADEC.
Therefore manufacturer differentiates between:
Primary Stations and Secondary Stations
Page: 20
A319/A320/321
CFM56-5A
72-00
STA 0
STA 12
STA 13
STA 25
STA 3
STA 49.5 STA 5
For Training Purposes Only
Lufthansa Technical Training
ENGINE
STATIONS
Figure 10
FRA US-E Bu
July 99
Aerodynamic Stations
Page: 21
Lufthansa Technical Training
ENGINE
General Arrangement
ATA 72
ENGINE
72-00
GENERAL ARANGEMENT
ENGINE MODULES
Purpose
The engine is of modular design,thus enabling maintenance to be performed by
maintenance work shops having limited repair capability.Modular maintenance
is concerned primarily with replacement of modular assemblies and parts.
Major Modules
The engine has four major modules:
Fan and Booster major module
Core major module
Low pressure turbine major module
Accessory drive module
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72-00
ENGINE MAIN BEARINGS
The rotors are supported by 5 bearings mounted in two engine sumps for lubrication system simplicity.
Bearings
The engine rotors are supported by bearings installed in the sump cavities
provided by the two frames.
The forward sump is in the fan frame and is the location of bearings No. 1,
No. 2 (fan/booster shaft) and No. 3 (HPshaft forward part).
The aft sump is in the turbine rear frame where are bearings No. 4 (HPshaft aft
part) and No. 5 ( LP shaft aft part).
Oil Distribution
The bearings must be lubricated and oil is distributed to these components
by nozzles. However, the oil must be retained within the engine, so seals
of various types are provided to confine the oil and directs its
recirculation.
For Training Purposes Only
Seals Arrangement
The arrangement of oil and air seals, the provisions for oil supply, oil
scavenge, seal pressurization, sump vent subsystems produce a system
known as a dry sump.
Engine sumps are vented to ambient pressure through the ”center-vent” tube
which is contained in the LP shaft.
FRA US/T Bu July 1999
Seite: Page: 22
N1 BEARING NO.:
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1
2
N2 BEARING NO.:
For Training Purposes Only
Lufthansa Technical Training
ENGINE
General Arrangement
5
3B
3R
4
2 OILSUMPS
FWD OIL
SUMP
FAN FRAME
Figure 11
FRA US/T Bu July 1999
2 FRAMES
AFT OIL
SUMP
TURBINE FRAME
Engine Construction
Seite: Page: 23
Lufthansa Technical Training
ENGINE
General Arrangement
19/
A319/A320/A321
CFM56-5A
72-00
FRAMES AND CASES
The two main load carring cases are called frames.The load from the rotorsystems and from the other cases are transfered to the frames.The frames transfer the load to the engine mounts.
ENGINE FLANGES
Flanges are located on the engine for attachment of brackets,claps,bolt,etc.
Physical Description
The external flanges of the engine have been assigned letter designations alphanumerical from A to U.The letters I,O and Q are not used.The letter designations are used for flange identification whenever it is necessary to be explicit
about flange location.
For Training Purposes Only
Horizontal flanges are identified by:
Front stator case horizontal left flange.
Front stator case horizontal right flange.
FRA US/T Bu July 1999
Seite: Page: 24
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72-00
For Training Purposes Only
Lufthansa Technical Training
ENGINE
General Arrangement
Figure 12
FRA US/T Bu July 1999
Engine Frames
Seite: Page: 25
Lufthansa Technical Training
For Training Purposes Only
ENGINE
General Arrangement
72-20
19/
A319/A320/A321
CFM56-5A
72-20
FAN AND BOOSTER ASSEMBLY
FAN AND BOOSTER MODULE
Purpose
The fan and booster (LPC) module is driven by the low pressure turbine and
provides two seperate air streams.
The primary (or inner) air stream flows through the fan and booster section
where the air is compressed for introduction into the high pressure compressor.The secondary (or outer) air stream is mechanically compressed by the fan
as it enters the engine and is ducted to the outside of the core engine.this secondary air stream adds to the propulsive force generated by the core engine.
Fan Blades
There are 36 titanium alloy, mid-span shrouded fan blades approximately 23in.
(590 mm) long. Each of the blades has a dovetail base that engages in disk rim
recess.Blades are individually retained by a spacer that limits radial movement,a blade retainer that limits forward axial movement and by the booster
spool front flange that limits axial movement rearward.
Description
The fan and booster module consists of a single stage fan rotor and a 3-stage
axial booster, cantilever-mouted at the rear of the fan disk.
The fan and booster module consists of the following major parts:
Spinner rear and front cones.
Fan disk.
Fan blades.
Booster rotor.
Booster vane assemblies.
Spinner Front Cone
The spinner front cone is made of composite material. Its design precludes the
need for an engine nose anti-icing system. The front cone is bolted to the rear
cone.
Spinner Rear Cone
The spinner rear cone is made of aluminum alloy. Its rear flange is bolted to the
fan disk and is part of the fan blades retention system.The outer rim of rear
flange is provided with tapped holes for trim balance bolts. The front flange provides for attachment of the spinner front cone.
Fan Disk
The fan disk is a titanium alloy forging. Its inner rear flange provides attachement for the fan shaft and its outer rear flange is bolted to the booster rotor.
The outer front flange provides attachment for the spinner rear cone.
The disk outer rim has 36 recesses designed for fan blade retention.
FRA US/T Bu July 1999
Seite: Page: 26
19/
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CFM56-5A
72-20
For Training Purposes Only
Lufthansa Technical Training
ENGINE
General Arrangement
Figure 13
FRA US/T Bu July 1999
Fan and Bosster Assembly
Seite: Page: 27
Lufthansa Technical Training
ENGINE
General Arrangement
FAN FRAME ASSEMBLY
The fan frame module provides front handling mounts and is the main forward
support for mounting the engine to the aircraft. Its purpose is to support the
fan, booster and high pressure compressor (HPC) rotors, and to provide ducting for primary and secondary airflows.
The fan frame module consists of the following major assemblies:
- Fan frame assembly.
- Fan outlet guide vane (OGV) assembly.
Functions.
The Fan Frame and Fan Case perform the following primary functions:
Fan Frame.
An inlet airflow path to the core engine.
A support for loads of the fan stator, fan rotor and fan reverser.
Containment of accessory drive power take off gearing and shaft.
A variable bypass valve system.
Housing for service lines for lubrication of bearings, inlet gearbox
and scavenge of the FWD oil sump.
Support for the fan OGV’s and fan inner flowpath acoustic panels.
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72-20
struts.
Structural strength for the fan frame is obtained from the 12 struts. The struts
are hollow and provide passage for the following equipment :
No. 1 bearing vibration sensor cable (No. 4 strut).
N1 speed sensor and FWD sump cavity drain (No. 6 strut).
Transfer gearbox (TGB) radial drive shaft and scavenge tube (No. 7 strut).
Forward sump oil supply tube (No. 10 strut).
Radial Struts
For Training Purposes Only
Fan Case.
Provides for attachment of the engine inlet cowl and the support and transmission of attachment loads from this point to the fan frame.
Provides fan blade containment.
Provides attachment points for acoustical panels.
Provides an abradable microballon shroud for fan blade tips.
RADIAL STRUTS
Fan Frame Assembly
The fan frame assembly is a frabicated structural weldment constructed of concentric rings connected by radial struts. It consists of the basic fan frame structure and the fan inlet case.
The basic fan frame structure is made of steel alloy. It consists of a hub, mid
box structure and outer casing interconnected through 4 thick and 8 thin radial
FRA US/T Bu July 1999
Seite: Page: 28
Lufthansa Technical Training
ENGINE
General Arrangement
19/
A319/A320/A321
CFM56-5A
72-20
Fan Duct Panel
OGV
Abradable
VBV Door
For Training Purposes Only
VBV Fuel Motor
FAN DUCT PANEL
Figure 14
FRA US/T Bu July 1999
Fan Frame
Acoustic
Panel
Fan Frame Assembly
Seite: Page: 29
Lufthansa Technical Training
For Training Purposes Only
Engine
Fan Rotor Blades
72-21
A319/A320/A321
CFM 56-5A
72-21
FAN ROTOR BLADES
FAN BLADE REPLACEMENT
Sometimes it is neccessary to change fan blades if they are damaged.Single or
pairs of spare blades can then be installed.
The spare blades are grouped in pairs so that the difference between the
moment weights is limited to 200 cm.g.
However, you must do the checks and corrections described below before and
after blade installation to limit the engine vibration level and optimize its operation.
3 cases can exist:
If you must replace 3 pairs of fan blades or less and if the resultant static
imbalance is less than 80 cm.g no correction is necessary.
If you must replace 3 pairs of fan blades or less and if the resultant static
imbalance is between 80 cm.g and 400 cm.g, only a static correction of imbalance is necessary.
If you must replace more than 3 pairs of fan blades or if the resultant static
imbalance is greater than 400 cm.g, a new fan blade distribution by hand
method a computer method and a static correction of imbalance are
necessary.
NOTE :
In all replacement cases: 1,2,3....or more pairs of fan blades and for individual
fan blade replacement, do a vibration check after the static correction if the aircraft is at the main base or as soon as the aircraft returns to the base .Results
from the vibration survey will determine if the trim balance is necessary.
Record location of each blade to be replaced and of each blade opposite.
CAUTION :
FOR EACH PAIR OF FAN BLADES, INSTALL THE HEAVIER SPARE
BLADE AT THE POSITION OF THE HEAVIER BLADE TO BE REMOVED.
Remove damaged fan blades and install spare blades.
Determine the resultant vector length and direction, then select balance
screws to provide a correction returning the fan to its initial balance
condition as follows.
NOTE :
It is advisable to limit the number of balance screws on the spinner due the
complexity and the risk of confusion when performing further corrections, and
to install only one set of balance screws.This requires the construction of a
FRA US/T Bu July 1999
vector diagram for determining
the sum of the corrections. An example is given in (Ref. TASK
72-21-00-300-006).
Balance Screws
Balance screws are identified by a number corresponding to their moment
weight (P01-P02-P03-P04-P05-P06-P07) engraved on screw head.
As it may be difficult to read the numbers due to erosion and pollution, the relationship between the screw reference and screw length is shown in inches.
Fan Blade Moment Weight and Classification Code
The moment weight (cm.gram), is the weight of the fan blade multiplied by the
distance ”centre of gravity to centre of rotation”
The moment weight is engraved on the lower side of the fan blade root.
Weight and centre of gravity of fan blades is different due to manufacturing tolerances.
Page: Page: 30
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
Spinner Rear
Cone
Spinner Front
Cone
For Training Purposes Only
Balance Screws
Figure 15
FRA US/T Bu July 1999
Fan Blade Damage Limit
Page: Page: 31
Lufthansa Technical Training
Engine
Fan Rotor Blades
SPINNER FRONT / REAR CONE REM./INST.
AMM Procedure 72-21-00
CAUTION:
On the panel 115VU, put a warning notice to tell the persons not to start
the engine 1(2).
Make sure that the engine 1(2) is shut down for at least 5 minutes.
On the panel 50VU, make sure that the ON legend of the ENG FADEC
GND PWR 1(2) pushbutton switch is off and install a warning notice.
For Training Purposes Only
Removal of Spinner Front /Rear Cone
Remove the bolts which attach the spinner front cone to the spinner rear
cone .
Move the spinner front cone apart from the spinner rear cone with the 3
jackscrews from the tool set TOOL SET JACKSCREW, (856A1130P08).
Remove the bolts which attach the spinner rear cone to the fan disc.
Remove the spinner rear cone from the fan disk with the 6 jackscrews from
the tool set, TOOL SET JACKSCREW (856A1130G09).
Installation of the Spinner Rear Cone
Make sure that the aircraft is in the same configuration as for the removal task.
Procedure
Apply a thin layer of engine oil (Material No. CP2442) to the 3 PIN,GUIDE SPINNER REAR CONE (856A3409).
Install the 3 guide pins, equally spaced, on the forward flange of the fan
disk. Install one of the pins in the offset hole.
Install the spinner rear cone as follows:
Apply a thin layer of graphite grease (Material No. CP2101) to the threads
of the bolts .
Increase the temperature of the aft flange of the spinner rear cone to 60
deg.C (140.00 deg.F) with a heat gun.
Install the spinner rear cone on the fan disk forward flange with the offset
holes aligned.
NOTE :
The offset hole in the spinner rear cone is identified by a spherical indentation on its rear flange.
FRA US/T Bu July 1999
A319/A320/A321
CFM 56-5A
72-21
Attach the rear cone to the disk with 3 bolts and washers.Make sure it is
correctly seated.
Let the assembly return to the ambient temperature.Then remove the guide
pins.Replace the guide pins (856A3409) with the bolts and the washers.
TORQUE the bolts to between 95 and 115 lbf.in (1.07 and 1.29 m.daN).
Do a check of the clearance (gap ) between the rear edge of the spinner
rear cone and the fan blades with a filler gage set.
Spinner Rear Cone to Fan Blade Clearance Limits.
NOTE : This clearance (gap) must be comprised between 0.012 in.(0.3047
mm) and 0.043 in. (1.0921 mm).
In case of incorrect clearance, remove the rear cone, and make sure that the
fan blades are correctly installed.
Installation of the Spinner Front Cone
Apply a thin layer of engine oil (Material No. CP2442) to the 3 PIN,GUIDE SPINNER REAR CONE (856A3409).
Install the three guide pins equally-spaced on the front flange of the spinner
rear cone . Install one of the pins in the offset hole of the flange.
Increase the temperature of the front flange of the spinner rear cone to
approximately 80 deg.C (176.00 deg.F) with a heat gun.
Install the spinner front cone on the spinner rear cone .Carefully align the
offset holes.
Apply a thin layer of engine oil (Material No. CP2442) to the threads of the 6
bolts, and attach the spinner front cone with the bolts.Tighten the bolts by
hand, and let the mating parts return to the ambient temperature.
TORQUE the bolts to between 95 and 115 lbf.in (1.07 and 1.29 m.daN).
Close-up
Make sure that the work area is clean and clear of tool(s) and other items.
Remove the warning notices from the panels 115VU and 50VU.
Remove the access platform(s).
Page: Page: 32
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
DETAIL VIEW
(center punch mark)
3 2 1
MARK for No 1
Blade
GAP
0,3-1,1 mm
36
SPINNER FRONT
CONE
For Training Purposes Only
O-RING
Threaded Inserts
for Fan Trim Balance Screws
SPINNER REAR
CONE
nm7221004uem0
Figure 16
FRA US/T Bu July 1999
Spinner Cone Installation/Removal
Page: Page: 33
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
AMM FAN BLADE REMOVAL / INSTALLATION
CAUTION :
ALL FAN ROTOR BLADES SHALL BE MATCHMARKED OR
NUMBERED FOR ASSEMBLY IN ORIGINAL ALIGNMENT
AND POSITION USING ONLY APPROVED MARKING MATERIAL.
CAUTION :
USE ONLY APPROVED MARKING MATERIAL TO PREVENT
DAMAGE TO THE BLADES.
For Training Purposes Only
On the panel 115VU, put a warning notice to tell the persons not to
start the engine 1(2).
Make sure that the engine 1(2) is shut down for at least 5 minutes.
On the panel 50VU, make sure that the ON legend of the ENG FADEC
GND PWR 1(2) pushbutton switch is off and install a warning notice.
FRA US/T Bu July 1999
Removal of the Fan Rotor Blades
Remove spinner front cone. (Ref. TASK 72-21-00-000-001)
Remove spinner rear cone. (Ref. TASK 72-21-00-000-002)
Procedure
NOTE: Removal will be easier if fan blade to be removed is placed at the
12 o’clock position.
Remove the blade retainers as follows:
Remove, partially or completely, the O-ring located between the fan blade
platform and the fan disk.
Slide the spacer toward the front of the disk with the ADAPTER,PULLER FAN BLADE SPACERS (856A2700G01) , until the blade retainer is released
Slide down the blade retainer located in the fan disk. Remove the blade retainer.
Remove the fan blades as follows:
Move the blade radially inward to disengage the mid-span shroud.Then slide
the blade forward until it comes out of the dovetail slot.Remove the blade
damper.
Slide the adjacent blades forward, if necessary, as follows:
(a) Pull the spacer under the adjacent blade forward with the
ADAPTER, PULLER - FAN BLADE SPACERS (856A2700) and snap-on
puller slide hammer CG240-9 and snap-on puller rod without end
CG-240-8. Slide down and remove the retainer.
(b) Move the blade radially inward to disengage the mid-spanshroud.Then
slide the blade forward until it comes out of the dovetail slot.
(c) Remove blade damper from the disk.
(d) Do the steps (a), (b) and (c) for the other adjacent blade.
Page: Page: 34
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
MOMENT WEIGHT
Blade Damper
Damper Retainer
Fan Blade
For Training Purposes Only
12 o clock position
Spacer
nm7221004uamo
nm7221004ucm0
Fan Disc
Blade
Retainer
Figure 17
FRA US/T Bu July 1999
Fan Blade Removal / Installation
Page: Page: 35
Lufthansa Technical Training
Engine
Fan Rotor Blades
CFM 56-5A
72-21
AMM FAN BLADE REMOVAL / INSTALLATION
CAUTION :
DO NOT DISSOCIATE FAN BLADE PAIRS MATCHED DURING
ORIGINAL ASSEMBLY. BLADES FROM A SAME PAIR MUST
ALWAYS BE LOCATED 180 DEGREES APART.
NOTE:
Before installation of the last blade, you must make sure that all fan blade
dampers are installed.
(4) Install the other blades, retainers, spacers and fan blade dampers.
CAUTION :
WHEN YOU INSTALL THE FAN BLADES, MAKE SURE
THAT ALL DAMPERS ARE CORRECTLY INSTALLED UN
DER EACH BLADE PLATFORM.
NOTE :
The midspan shroud section of the blades must engage and
mate with the related midspan shroud sections of the adjacent
blades.
Installation of the Fan Rotor Blades
Make sure that the aircraft is in the same configuration as for the removal
task.
Procedure
NOTE :
Installation will be easier if the fan disk blade recess into which the blade is to
be installed is placed at the 6 O’clock position.
For Training Purposes Only
A319/A320/A321
Install the blades as follows:
Apply a thin layer of molycote graphite (Material No. CP2104) or molycote
321 R (Material No. CP2007) to the mid-span shrouds, the roots, the platform mating surfaces under the platform, the antiwearshields of dampers
and the disk slots.
Move the blade rearward into the disk slot. Then, move the blade radially
outward to engage the mid-span shroud with the adjacent blades.
Install blade retainer as follows:
(1) Slide the blade retainer into the related disk slot.
(2) Slide the blade spacer into the disk recess until the spacer
lug goes through the retainer slot.
(3) Install the fan blade damper under the blade platform before you
install the next blade in its disk slot.
FRA US/T Bu July 1999
CAUTION :
MAKE SURE THAT ALL THE 36 BLADES, RETAINERS, SPACERS AND
DAMPERS ARE CORRECTLY INSTALLED.
Make sure the O-ring is not damaged.
If the O-ring is serviceable, apply a thin layer of engine oil (Material No.
CP2442). Install it by hand between the blade platform and the disk.
Close-up
Install spinner rear cone. (Ref. TASK 72-21-00-400-002)
Install spinner front cone. (Ref. TASK 72-21-00-400-001)
Make sure that the work area is clean and clear of tool(s) and other items.
Remove the warning notices from the panels 115VU and 50VU.
Test
Subtask 72-21-00-710-050
Perform a vibration check (Ref. TASK
71-00-00-710-009).
Page: Page: 36
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
MOMENT WEIGHT
Blade Damper
Damper Retainer
For Training Purposes Only
Fan Blade
Spacer
Figure 18
FRA US/T Bu July 1999
Fan Disc
Blade
Retainer
Fan Blade Removal / Installation
Page: Page: 37
Lufthansa Technical Training
Engine
Fan Rotor Blades
A319/A320/A321
CFM 56-5A
72-21
INDIVIDUAL FAN BLADE REPLACEMENT:
If difference between moment weights ”D” is within 80-800 cm.g, correct
the imbalance as in the example which follows:
Assume a blade with moment weight of 162750 cm.g is to be replaced in
any position.
A spare blade is provided with moment weight of 163296 cm.g.
Calculate the difference between the moment weights as below:
163296 - 162750 = 546 cm.g.
Select balance screws as follows:
To determine the solutions closest to above difference of 546
cm.g. One centered screw P05 and 2 lateral screws P01 = 541 cm.g.
This solution permits a satisfactory correction for returning the fan close to its
initial balance condition.
Locate balance screws as follows:
As the new blade is heavier than the removed blade, install balance screws
close to the opposite blade.
NOTE : If the new blade is lighter than the removed blade, install balance
screw close to the removed blade.
For Training Purposes Only
Perform a trim balance operation. (Only if difference between moment weights
is within 400 and 800 cm.g).
FRA US/T Bu July 1999
Page: Page: 38
A319/A320/A321
CFM 56-5A
72-21
For Training Purposes Only
Lufthansa Technical Training
Engine
Fan Rotor Blades
Figure 19
FRA US/T Bu July 1999
Individual Fan Blade Replacement
Page: Page: 39
72-30
A319 / A320 / A321
CFM56-5A
72-30
HP-COMPRESSOR
HP COMPRESSOR DESCRIPTION
The major Components of the compressor are: Compressor rotor and compressor stator. The front of the compressor stator is supported by the fan frame
and the front of the compressor rotor is supported by the No 3 bearing in the
fan frame.
The rear of the compressor stator is attached to the combustion case and the
rear of the compressor rotor is attached to the HPT rotor to form the core rotor.
The rear of the core rotor is supported by the No. 4 bearing.
A portion of the fan discharge airflow passes thru the booster to the compressor. Compression is progressive as the primary airflow moves from stage to
stage through the axial compressor. Air passes through successive stages of
compressor rotor blades and compressor stator vanes, being compressed as it
passes from stage to stage.
After passing through 9 stages of blades, the air has been compressed.
The inlet guide vanes and the first 3 stages of the stator are variable, and
change their angular position as a function of compressor inlet temperature and
engine speed. The purpose of this variability is to optimize efficiency and stall
margin for engine speed, compressor inlet temperature and pressure conditions.
For Training Purposes Only
Lufthansa Technical Training
ENGINE
HP-Compressor Section
FRA US/T Bu July 1999
Seite: Page: 40
Lufthansa Technical Training
ENGINE
HP-Compressor Section
A319 / A320 / A321
CFM56-5A
72-30
4x 5th Stage Air for LPT Nozzle Guide Vane Cooling
1x 5th Stage Air for HPT Clearance Control
1x 5th Stage Air for Aircraft Pneumatic
1x 5th Stage Air for Inlet Anti Ice
1x 5th Stage Air for RACC
4x 9th Stage Air
for Aircraft Pneumatic
1x 9th Stage Air for HPT
Clearance Control
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉ
FRONT STATOR CASE
REAR STATOR CASE
1
For Training Purposes Only
1
2
9
3
HPC FRONT SHAFT
1
STATOR VANE NUMBER
BOOSTER and RACC AIR
Figure 20
FRA US/T Bu July 1999
HPC ROTOR
HP Compressor
Seite: Page: 41
Lufthansa Technical Training
ENGINE
HP-Compressor Section
A319 / A320 / A321
CFM56-5A
72-30
HP COMPRESSOR STATOR ASSEMBLY
General
The compressor front stator consists of the front casing halves, the inlet
guide vanes (IGV), and the first 5 stages of stator vanes.
Front Stator Casing
The front case halves are made from steel forging. Bleed air is taken from the
pads on the front case for the use of the customer. The bleed air is also used
for high pressure turbine cooling and clearance control and for low pressure
turbine cooling.
Vanes
The IGV and the stages 1 through 3 vanes are variable ; the stages 4 and 5
vanes are fixed. All vanes are made of steel. All stages of vanes have honeycomb shrouds on their inner diameter. The shrouds together with the rotor seal
teeth, form interstage seals to prevent flowpath recirculation.
For Training Purposes Only
Variable Vane Actuation
Actuation of the variable vanes is accomplished with hydraulically actuated bellcranck assemblies mounted on the front compressor stator at the 2 and 8
o’clock positions.
Fixed linkages connect the bellcrancks to actuation rings. Lever arms attached
to the variable vanes connect to the actuation rings.Fuel from the hydromechanical unit (HMU) operates the hydraulic actuators.
FRA US/T Bu July 1999
Seite: Page: 42
A319 / A320 / A321
CFM56-5A
72-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
HP-Compressor Section
Figure 21
FRA US/T Bu July 1999
HP Compressor Stator Assembly
Seite: Page: 43
Lufthansa Technical Training
ENGINE
COMBUSTION SECTION
72-40
CFM56-5A
72-40
COMBUSTION SECTION
COMBUSTION SECTION DESCRIPTION
HIGH PRESSURE TURBINE
General
The combustion case is a fabricated structural weldment located between the
high pressure compressor (HPC) and the low pressure turbine (LPT). It provides the structural interface, transmits the engine axial load, and provides gas
flow path between the compressor and LPT. The case incorporates the compressor outlet guide vanes (OGV) and a diffuser for the reduction of combustion chamber sensitivity to the compressor air velocity profile.
The HPT consits of a 1-stage nozzle and rotor.The nozzle are supported by the
HPT case,the rotor is attached to the high pressure compressor rotor.
The vanes and platforms are cooled by compressor discharge air entering the
vane compartments through inserts in the inner and outer ends of vanes and
exiting through the vane leading and trailing edges.
An air cavity between the shroud/nozzle support and the combustion case directs mixed 5th and 9th stage compressor bleed air onto the support .This
cooling air maintains closer tip clearance between the shrouds and the rotor
blades.
Components
The combustion case encloses the combustion chamber and high pressure
turbine (HPT) components. The combustion chamber, compressor rear stationary (CDP) seal, HPT nozzle assembly, and HPT shroud/stage 1 LPT nozzle
assembly are mounted in and structurally supported by the combustion case.
The case mounts and positions the 20 fuel nozzles, 2 igniters, and fuel manifold.The fuel manifold system is composed of a fuel supply manifold (Y tube),
2fuel manifolds halves, 3-piece drain manifold, and overboard drain tube.
For Training Purposes Only
A319 / A320 / A321
Ports
There are 6 borescope ports ; 4 for inspection of the combustion chamber and
HPT nozzles and 2 for inspection of the HPT blades and shrouds and the stage
1 LPT blades. The case has 4 ports for extraction of compressor discharge air
for customer use, 4 ports for introduction of stage 5 compressor air forLPT
nozzle guide vane cooling, 2 for introduction of air to the shrouds). There is
also one port for the following : start bleed dump, P3 sensor, T3 sensor, and
CDP air. There are 2 ports for the spark igniters and 2 ports for turbine clearance control thermocouples.
FRA US/T Bu
July 1999
Page: 44
Lufthansa Technical Training
ENGINE
COMBUSTION SECTION
A319 / A320 / A321
CFM56-5A
72-40
HPT CLEARANCE CONTROL AIR
MIDFLANGE
AFT FLANGE
BORESCOPE
BOSS
COMBUSTION CHAMBER
HPT NOZZLE FWD
INNER SUPPORT
DIFFUSER
HPT SHROUD
BOLT
BOLT SHIELD
NUT SHIELD
FUEL NOZZLE PADS
For Training Purposes Only
TCASE
HPC 9TH
STAGE
VANES
CDP SEAL
HPC 9TH STAGE BLEED PORT
IGNITER
BOSS
PS3 PAD
LPT STAGE 1
COOLING AIR
Figure 22
FRA US/T Bu
July 1999
Combustion Case
Page: 45
Lufthansa Technical Training
ENGINE
TURBINE SECTION
72-50
A319 / A320 / A321
CFM56-5A
72-50
TURBINE SECTION
LPT ROTOR & STATOR MODULE
The modules of the turbine are the high pressure turbine and the low pressure
turbine.
High Pressure Turbine
The HPT consits of a 1-stage nozzle and rotor.The nozzle are supported by the
HPT case,the rotor is attached to the high pressure compressor rotor.
The vanes and platforms are cooled by compressor discharge air entering the
vane compartments through inserts in the inner and outer ends of vanes and
exiting through the vane leading and trailing edges.
An air cavity between the shroud/nozzle support and the combustion case directs mixed 5th and 9th stage compressor bleed air onto the support .This
cooling air maintains closer tip clearance between the shrouds and the rotor
blades.
For Training Purposes Only
Low Pressure Turbine
The LPT module consits of a 4 - stage turbine,rotor,nozzle,statorcase and rear
frame.The rotor is connected to the fan.Surrounding the stator case is a clearance control manifold system.
Stage 2 LPT nozzle assembly have holes to house the 9 EGT probes.
FRA US/T Bu
July 1999
Page: 46
Lufthansa Technical Training
ENGINE
TURBINE SECTION
A319 / A320 / A321
CFM56-5A
72-50
LPT CASE
EGT
PROBES
INSULATION
BLANKETS
LPT CASE AIR
COOLING MANIFOLD
ASSEMBLY
STATOR ASSEMBLY
LPT CASE
4
ROTOR ASSEMBLY
3
2
LPT OUTER
STATIONARY
AIR SEAL
1
2
3
4
ROTATING
AIR SEAL
For Training Purposes Only
LPT DISK
LPT INNER
STATIONARY
AIR SEAL
TURBINE ROTOR SUPPORT
FWD ROTATING
AIR SEAL
2
Figure 23
FRA US/T Bu
July 1999
3
4
INNER FWD ROTATING OIL SEAL
STAGE NUMBERS OF VANES
LPT Rotor & Stator Module
Page: 47
A319 / A320 / A321
CFM56-5A
72-50
TURBINE FRAME MODULE
The turbine frame consits of:
Turbine Frame
No.5 Bearing Support with Oil Sump Assy
Oil Inlet Cover
Flange assy
Flame Arrestor
16 Radial Stuts
For Training Purposes Only
Lufthansa Technical Training
ENGINE
TURBINE SECTION
TURBINE FRAME
FRA US/T Bu
July 1999
Page: 48
Lufthansa Technical Training
ENGINE
TURBINE SECTION
A319 / A320 / A321
CFM56-5A
72-50
LUGS FOR
AFT ENGINE MOUNT
OUTER CASING
HUB HEATING
GAS INLET
HEAT
INSULATION
HANDLING
BRACKET
OIL SUMP ASSY
ADJUSTING
SLEEVE
For Training Purposes Only
HANDLING
BRACKET
NO.5 BEARING
SUPPORT
STRUT
EXHAUST
PLUG
OIL INLET
COVER
FLAME
ARRESTOR
OIL SUPPLY
TUBE
FLANGE
ASSEMBLY
SCAVENGE TUBE
OIL SUPPLY
TUBE
SCAVENGE TUBE
Figure 24
FRA US/T Bu
July 1999
CAVITY DRAIN
TUBE
Turbine Frame Module
Page: 49
Lufthansa Technical Training
ENGINE
ACCESSORY GEARBOX
72-60
A319 / A320 / A321
CFM56-5A
72-00
ACCESSORY DRIVE SECTION
ACCESSORY GEARBOX
Power for both engine and aircraft accessories is extracted thru a system of
gearboxes and shafts. The accessory gearbox, which is supported by the compressor case, takes power from the core engine compressor stub shaft. An
inclined radial drive shaft transmits this power to the transfer gearbox, mounted
below the compressor stator casing.
A horizontal drive shaft then transmits the power to the core mounted accessory drive gearbox.
The accessory gearbox drives the following equipment :
IDG (electrical power generation) .
FADEC Control Alternator
Hydraulic pump (hydraulic power generation).
The fuel pump and HMU .
lubrication unit ( lube pump) .
For Training Purposes Only
HMU
Top View Of Accessory Drive Section
Arrangement Of The Accessories
FRA US/T Bu
July1999
Page: 50
Lufthansa Technical Training
ENGINE
ACCESSORY GEARBOX
A319 / A320 / A321
CFM56-5A
72-00
ACCESSORY GEARBOX
HORIZONTAL
DRIVE SHAFT HOUSING
TRANSFER
GEARBOX
STARTER
PAD
FUEL PUMP
AND HMU
IDG PAD
HAND CRANKING
DRIVE
For Training Purposes Only
CONTROL ALTERNATOR
POSITION
HYDRAULIC PUMP
PAD
LUBRICATION UNIT
FWD
Figure 25
FRA US/T Bu
July1999
Accessory Gearbox
Page: 51
Lufthansa Technical Training
ENGINE
ACCESSORY GEARBOX
A319 / A320 / A321
CFM56-5A
72-00
ACCESSORY GEARBOX SEALS
There can be two seal types used:
The magnetic seal and the sealol seal.They are interchangeable
The magnetic seal (Option)
consists of a nonmagnetic seal housing,
a magnetic seal with a glazed face and a carbon seal held by the magnet on
the rotating part.The pull of the magnet maintains constant contact with the
magnetic seal glazed seal face.
This seal is used for the starter and the IDG drive pad.
The magnetic seals are matched assemblies.If one of the components is
damaged,replace the complete seal!
The sealol seal
consists of the following parts:
A mating ring ( glazed face ) with four lugs engageing the four corresponding slots in the gearshaft ball bearing.
A cover,secured to the bearing housing with nuts , to ensure constant contact between the glazed face and the static part of the seal.
The sealol seals are matched assemblies.If one of the components is
damaged,replace the complete seal!
Note: This seal is not used any more by Lufthansa.
Retaining Ring
Seal Housing
For Training Purposes Only
O-Ring
Magnet
Carbon Ring
MAGNETIC SEAL
FRA US/T Bu
(OPTION!)
July1999
O-Ring
SEALOL SEAL
Page: 52
MAGNETIC SEAL
A319 / A320 / A321
CFM56-5A
72-00
(OPTION!)
SEALOL SEAL
For Training Purposes Only
Lufthansa Technical Training
ENGINE
ACCESSORY GEARBOX
Figure 26
FRA US/T Bu
July1999
Accessory Drive Seals
Page: 53
Lufthansa Technical Training
ENGINE
BORESCOPE
72-21
A319 / A320 / A321
CFM56-5A
72-21
BORESCOPE INSPECTION
BORESCOPE PORTS
Purpose
The borescope provides a system for visually inspection of the various internal parts of the engine.
General Component Locations
Borescope locations are provided fof inspetion of the fan area,booster,high
pressure compressor,combustion chamber,high and low pressure turbines.
For Training Purposes Only
General Operation
Inspection preparation requires removal of borescope plugs in certain areas
and rotation of the engine for checking of individual blades.The leading edges
of the fan blades and the trailing edges of the last stage turbine blades can be
inspected without the use of the borescope.
FRA US/T Bu
Jully 1999
Page: 54
Lufthansa Technical Training
ENGINE
BORESCOPE
A319 / A320 / A321
CFM56-5A
72-21
1:00
3:00
9:00
8:30
6:00
5:30
Aft Looking Forward
view, clockwise.
19 ports are distributed as follows:
For Training Purposes Only
- LP compressor
- HP compressor
- combustion chamber
- HP turbine
- LP turbine
3:30
5:00
5:00
1
9
4 (+2)*
2
3
*Note: The HP Turbine blade leading edges can be inspected
through the ignitor holes.
Figure 27
FRA US/T Bu
Jully 1999
Borescope Ports
Page: 55
A319 / A320 / A321
CFM56-5A
72-21
HP COMPRESSOR SPECIAL BORESCOPE PLUGS
The borescope plugs S7,S8,and S9 are special double plugs.Install borescope
plugs finger tight.Ensure contact between boss on inner liner and plug cap.
Compress spring load on outer cap and apply recommended torque.
For Training Purposes Only
Lufthansa Technical Training
ENGINE
BORESCOPE
FRA US/T Bu
Jully 1999
Page: 56
Lufthansa Technical Training
For Training Purposes Only
ENGINE
BORESCOPE
A319 / A320 / A321
CFM56-5A
72-21
HPC - ROTOR BORESCOPE INSPECTION PORTS
Double Borescope Plugs
Figure 28
FRA US/T Bu
Jully 1999
Special Borescope Plugs
Page: 57
Lufthansa Technical Training
ENGINE
BORESCOPE
A319 / A320 / A321
CFM56-5A
72-21
N2 ROTOR ROTATION PAD COVER
Inspection
The use of the borescope for inspection of the compressor and turbine blades
requires rotation of the core engine.This is accomplished by removing the
cover plate, useing a slide hammer, from the core engine rotation pad located
on the forward face of the accessory gearbox above the Control Alternator.
Install 3/4 inch square drive tool into the drive pad and rotate the engine.
Note.
This port can also be used to check if the core engine turns freely.
For Training Purposes Only
CAUTION:
Do not exceed recommended torque or engine parts may be damaged.
FRA US/T Bu
Jully 1999
Page: 58
A319 / A320 / A321
CFM56-5A
72-21
For Training Purposes Only
Lufthansa Technical Training
ENGINE
BORESCOPE
COVER
Control Alternator
Figure 29
FRA US/T Bu
Jully 1999
Handcranking Pad
Page: 59
Lufthansa Technical Training
ENGINE
MOUNTS
71-20
A319/A320/321
CFM56-5A
71-20
ENGINE MOUNTS
GENERAL
The engine mounts support the engine by transmitting loads from the engine
case to the pylon structure.
They allow thermal expansion of the engine without inducing additional load
into the mount system.
Each engine mount design provides dual load paths to ensure safe operation
if one member fail.
For Training Purposes Only
The engine/pylon connection is achieved by means of a two-mount system :
- the forward mount :
it is attached to the engine via the intermediate casing. It takes the X loads
(thrust), Y loads (lateral) and Z loads (vertical).
- the aft mount :
it is attached to the engine via the exhaust casing. It takes the loads in a plane
normal to the engine centerline i.e.: Y loads (lateral), Z loads (vertical) and Mx
(engine rotational inertia moment + Y load transfer
moment).
FRA US/T Bu
July 1999
Page: 60
A319/A320/321
CFM56-5A
71-20
For Training Purposes Only
Lufthansa Technical Training
ENGINE
MOUNTS
Figure 30
FRA US/T Bu
July 1999
Mounts and Loads
Page: 61
A319/A320/321
CFM56-5A
71-20
FWD MOUNT
AFT MOUNT
The forward mount connects the engine aft fan case with the engine pylon
forward structure. The forward mount is a damage tolerant design.
It consists of :
- the support beam assembly : for pylon connection via 4 tension bolts and 2
alignment pins.
This fail-safe designed fitting is an assembly of 3 components :
2 half-fittings and 1 plate.
The aft mount connects the engine turbine rear frame with the engine pylon
via a beam.
The aft mount takes the loads in the plane normal to the engine centerline, i.e.
y, z loads and Mx. The aft mount is a damage tolerant design.
It consists of 3 links and a crossbeam assembly.
There is a possibility of axial translation movement between the engine
casing and the pylon since :
- the three links are located in the same plane normal to the engine centerline
- the link end have bearings.
There is a possibility of axial translation movement between the engine casing
and the pylon.
This allows for casing expansions of about 0.236 in. (6 mm) in cruise and 0.295
in. (7.5 mm) at maximum thrust.
The aft mount consists of :
- 3 fail-safe links.
Each link is a triple element stacked assembly.
The cross beam has a mating face for connection with the engine pylon.
This attachment is made through 4 tension bolts and 2 shear pins.
One of the two shear pins is a back-up pin also used as an alignment pin.
The cross beam fitting is a fail-safe design : it consists of two lateral
parts linked by shear pins.
For Training Purposes Only
Lufthansa Technical Training
ENGINE
MOUNTS
FRA US/T Bu
July 1999
Page: 62
Lufthansa Technical Training
ENGINE
MOUNTS
A319/A320/321
CFM56-5A
71-20
FWD MOUNT
For Training Purposes Only
AFT MOUNT
Figure 31
FRA US/T Bu
July 1999
FWD / AFT Mount
Page: 63
Lufthansa Technical Training
POWER PLANT
NACELLE
A319/A320/A321
CFM56-5A
71-10
ATA 71
POWER PLANT
71-10
NACELLE ACCESS DOORS & OPENINGS
NACELLE GENERAL
The cowls enclose the periphery of the engine so as to form the engine nacelle.
The nacelle provides:
- protection for the engine and the accessories,
- ensures airflow around the engine during its operation,
- lightening protection,
- Hirf and EMI attenuation.
Note:The fan thrust reversers and the primary exhaust are covered in
78-00-00.
For Training Purposes Only
ACCESS DOORS & OPENINGS
Pressure Relief Door 438BR (448BR)
A pressure relief door located in the right cowl door limits compartment
pressure to a maximum of 4 psig. In addition, a compartment cooling air inlet
is located in the lower quadrant of the left cowl door.
The air inlet directs air toward the accessory gearbox. In the upper quadrants
of the left and right cowls there are five resistant air outlet vents.
NACELLE
The fan cowl doors enclose the engine fan case between the air intake cowl
and fan thrust reverser. Three hinges at the pylon support each assembly. The
door assemblies are latched along the bottom centerline with three adjustable
tension hook latches.
To improve take-off performance, aerodynamic strakes have been installed on
the inboard fan cowl of each nacelle, on some aircraft configurations.
The fan cowl doors are :
- fire proof with external air flow
- fire proof without external air flow above 45 degree radial
- fire resistant without external air flow below 45 degree radial.
The plus or minus 45 degree fire proof protection is accomplished by epoxy
layers.
Fan Cowl Structure
The internal pressure loads and external air loads are reacted through the
honeycomb structure. They are transmitted into the pylon through the hinge
fittings.
Access door 438CR (448CR),
in the right fan cowl door provides access to the starter valve manual override.
Access door 437BL (447BL) in the left fan cowl provides access for :
- engine oil service and
- inspection of the hydraulic filter clogging.
FRA US/T Bu
July 1999
Page: 64
Lufthansa Technical Training
POWER PLANT
NACELLE
A319/A320/A321
CFM56-5A
71-10
VENTILATION OUTLET
RIGHT SIDE
STRAKE (A320 only on inboard side installed)
INTERPHONE
JACK
ECU COOLING INLET
ANTI ICE
DISCHARGE GRILLE
THRUST REVERSER
PIVOTING DOOR
STARTER VALVE
ACCESS
STRAKE (A320 only on inboard side installed)
THRUST REVERSER
PIVOTING DOOR
DRAINMAST
PRESS
RELIEF DOOR
For Training Purposes Only
VENTILATION OUTLET
OIL TANK
ACCESS
LEFT SIDE
VENTILATION INLET
Figure 32
FRA US/T Bu
July 1999
Nacelle Access Doors / Openings
Page: 65
Lufthansa Technical Training
POWER PLANT
FAN COWL
A319/A320/A321
CFM56-5A
71-10
FAN COWLS
The fan cowl doors enclose the engine fan case between the air intake cowl
and fan thrust reverser. Three hinges at the pylon support each assembly. The
door assemblies are latched along the bottom centerline with three adjustable
tension hook latches.
To improve take-off performance, aerodynamic strakes have been installed on
the inboard fan cowl of each nacelle, on some aircraft configurations.
The fan cowl doors are :
- fire proof with external air flow
- fire proof without external air flow above 45 degree radial
- fire resistant without external air flow below 45 degree radial.
The plus or minus 45 degree fire proof protection is accomplished by epoxy
layers.
Fan Cowl Structure
The internal pressure loads and external air loads are reacted through the
honeycomb structure. They are transmitted into the pylon through the hinge
fittings.
For Training Purposes Only
Access door 438CR (448CR),
in the right fan cowl door provides access to the starter valve manual override.
Access door 437BL (447BL) in the left fan cowl provides access for :
- engine oil service and
- inspection of the hydraulic filter clogging.
Pressure Relief Door 438BR (448BR)
A pressure relief door located in the right cowl door limits compartment
pressure to a maximum of 4 psig. In addition, a compartment cooling air inlet
is located in the lower quadrant of the left cowl door.
The air inlet directs air toward the accessory gearbox. In the upper quadrants
of the left and right cowls there are five resistant air outlet vents.
FRA US/T Bu
July 1999
Page: 66
A319/A320/A321
CFM56-5A
71-10
For Training Purposes Only
Lufthansa Technical Training
POWER PLANT
FAN COWL
NM5 71 13 00 0 AANO
Figure 33
FRA US/T Bu
July 1999
Fan Cowl Doors
Page: 67
A319/A320/A321
CFM56-5A
71-10
FAN COWL OPENING / CLOSING
There are two telescopic hold open rods on each door.
The hold open rods lock to brackets on the engine fan case. They support the
fan cowl doors in the open position. A 40-degree position serves for routine
maintenance and a 55-degree position serves for increased access.
Note:
Engine Idle run with fan cowl doors open in the 40 degree position is allowed to perform maintenance tasks.
For Training Purposes Only
Lufthansa Technical Training
POWER PLANT
FAN COWL
FRA US/T Bu
July 1999
Page: 68
Lufthansa Technical Training
POWER PLANT
FAN COWL
A319/A320/A321
CFM56-5A
71-10
Caution:
Do not open cowlings if wind speed is
more than 65 knots or if engine is
running.
HOLD OPEN ROD
Opening:
For Training Purposes Only
Unlock the three latches of fan cowlings.
Release the hold - open rods from the stow brackets.
Extend the hold open rods to the 40 or 55 degree position
and attach them to the brackets on the engine.
LATCHES
Figure 34
FRA US/T Bu
July 1999
Fan Cowl Door Opening
Page: 69
Lufthansa Technical Training
POWER PLANT
FAN COWL
A319/A320/A321
CFM56-5A
71-10
FAN COWL ADJUSTMENT
TASK 71-13-00-800-040
Adjustment/Test of the Fan Cowl
CAUTIONS:
On the panel 115VU:
put a warning notice to tell persons not to start the engine 1(2).
Make sure that the engine 1(2) has been shut down for at least
5 minutes.
On the panel 50VU:
make sure that the ON legend of the ENG/FADEC GND PWR/1(2)
pushbutton switch is off.Install a warning notice.
For Training Purposes Only
Procedure
Measure the gap between the fan cowl doors at the bottom with the
closed. If the gap is more or less than 1.02 to 4.06 mm (0.040 to 0.160
in.) adjust the fan cowl doors as follows :
Open the fan cowl doors:
Remove the bolt (5), the nuts (10) and (15), the washers (20) and (25),
the shear pin (30), remove also the shims and the retainers from the
latch housing on the door.
Close the doors and engage the front and the rear latches only.
Adjust the latches so that a force of 4.44 to 11.12 daN (10 to 25lb.) is required to close them. Measure the force at the tip of the latch handle with a
push-pull gage.
Measure the gap between the doors at the bottom.
If the gap is more or less than 1.02 to 4.06 mm (0.040 to 0.160 in.), open
fan cowl doors and install the shims and the retainers as necessary in
front and rear latches (see paragrah A.).
This must bring the gap to within the specified range.
FRA US/T Bu
July 1999
NOTE :
The gap may taper from the front to the rear as long as it is within the specified
range.
Install the shims and the retainers on the front and the rear latch housings
with the bolts (5), the nuts (10) and (15). Install also the washers (20) and
(25), and the shear pins (30).TORQUE nuts to between 50 and 70 lbf.in
(0.56 and 0.79 m.daN)
Put the shims and the retainers as necessary in the center latch. This
must fill gap between the latch keeper and the latch housing.
Install the shims and the retainers on the center latch housing with the
bolt (5), nuts (10) and (15). Install also the washers (20) and (25), and
the shear pin (30). TORQUE the nuts to between 50 and 70 lbf.in (0.56
and 0.79 m.daN)
Page: 70
A319/A320/A321
CFM56-5A
71-10
For Training Purposes Only
Lufthansa Technical Training
POWER PLANT
FAN COWL
GAP
1-4mm
Figure 35
FRA US/T Bu
July 1999
Fan Cowl Adjustment
Page: 71
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER COWLS
ATA 78
EXHAUST
78-30
REVERSER COWL DOORS
A319/A320/A321
CFM56-5A
78-30
OPENING AND CLOSING OF THRUST REVERSER COWLINGS
Caution
Before opening:
Wing slats must be retracted and deactivated.
2.
All 3 latches must be released.
3.
Deactivate Thrust Reverser Hydraulic Control Unit ( HCU )
4.
FADEC power ”OFF”
5.
Put Warning Notices in the Cockpit
For Training Purposes Only
1.
FRA US/T Kh
03.98
Page: 72
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER COWLS
A319/A320/A321
CFM56-5A
78-30
FAN REVERSER CIRCUMFERENTIAL
VENT OPENING
For Training Purposes Only
(ELASTICITY DEFORMATION IN CASE OF
ENGINE BLEED BURST-OUT
T/R COWL
Figure 36
FRA US/T Kh
03.98
T/R Cowl Opening / Closing
Page: 73
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER COWLS
A319/A320/A321
CFM56-5A
78-30
OPENING AND CLOSING OF THRUST REVERSER COWLINGS
CAUTION
Do not open the thrust reverser cowlings if the wind speed is more than
40 knots.Make sure that the thrust reverser can not be operated.
Deactivate Thrust reverser system.
Make sure the slats are retracted.
Opening of the Thrust Reverser Cowlings
Open the fan cowlings.
Unlock the four latches along the lower edge of the cowls.
Connect the hand pump.
Operate the hand pump to open the half cowling to the normal maintenance
position. The doors can be opened to 33 degrees with the wing leading
edge slats extended. However, beyond the 33 degree position they interfere with the wing leading edge slats when extended and thus can cause
damage. Maximum opening is 45 degrees.
For Training Purposes Only
Closing of the Thrust Reverser Cowlings
Operate the hand pump to pressurize the opening actuator to take the load
of the hold-open rod.
Remove the hold-open rod.
Open the hand pump relief valve to let the cowling close.
Close the-four latches.
Cowling pump must be connected for some time to allow a retunflow of the
oil from the opening actuator to the pump.(to prevent oil leckage of the
opening actuators when the engine operates and the oil expands due to
heat.)
FRA US/T Kh
03.98
Page: 74
A319/A320/A321
CFM56-5A
78-30
Hold Open Rod
For Training Purposes Only
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER COWLS
Figure 37
FRA US/T Kh
03.98
T/R Cowl Opening / Closing
Page: 75
Lufthansa Technical Training
For Training Purposes Only
ENGINE
REVERSER COWLS
A319/A320/A321
CFM56-5A
78-30
THRUST REVERSER COWL ADJUSTMENT
TASK 78-36-41-820-040- 01
CAUTION:
Make sure that the engine 1(2) has been shutdown for at least 5 minutes.
On the panel 50VU :
-Make sure that the ON Legend of the ENG/FADEC GND PWR/ 1(2)
pushbutton switch is off
- Install a warning notice
-Make the thrust reverser unserviceable
PROCEDURE:
Open the fan cowl doors
Fasten all latches
CAUTION:
ALL LOCATING PINS MUST BE IN FULL CONTACT WITH BUSHINGS OR
DAMAGE COULD OCCUR TO REVERSER.
Make sure of the full contact between each bushing and locating pin.
Adjust latches:
NOTE : You must apply this procedure after the installation of a complete
thrust reverser or after changing a reverser half door on the aircraft.
(1) Open the forward latch.
(2) Remove the screw which attach the lockwasher.
(3) Remove the lockwasher.
(4) Tighten with your hand the latch tension nut and put it in a position
which permits the installation of the lockwasher.
(5) Measure the force on the latch handle tip with the push gage: range
30.27 to 41.09 lbs (14 to 19 daN) which is necessary to lock it.
(6) The recorded force must be between 14 daN (31.4732 lbf) to 19 daN
(42.7136 lbf).
(7) If the recorded force is not within tolerances turn the latch tension
nut to obtain the force indicated.
NOTE : Turn the tension nut by twelth of a turn to keep the position
which permits the installation of the lockwasher.
FRA US/T Bu
July 1999
4.
(8) Install the lockwasher and screw which attach the latch tension nut.
(9) TORQUE the screw to between 35 and 45 lbf.in (0.39 and 0.50 m.daN).
(10) Adjust the three other latches with the same procedure step 1 to step9.
(11) Do a check of each latch from the front to the rear. The force applied
on the latch handle tip must be between 14 daN (31.4732 lbf) to
19 daN (42.7136 lbf).
Close-up
Make sure that the aircraft is in the same configuration as for the removal
task.
Make the thrust reverser serviceable
Close fan cowl doors
Remove the warning notices from the panels 115VU and 50VU.
Page: 76
A319/A320/A321
CFM56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
REVERSER COWLS
Figure 38
FRA US/T Bu
July 1999
Check of Latch adjustment
Page: 77
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM 56-5A
79-00
ATA 79
OIL
79 - 00
GENERAL
SYSTEM PRESENTATION
For Training Purposes Only
General Description
a Supply Circuit
a Scavenge Circuit
a Vent Circuit
It Lubricates and cools the Bearings of the Forward and Aft Sumps.
It also lubricates Bearings and Gears in the Transfer and Accessory Gear
Boxes.
The Major Components of the Oil System are:
The Oil Tank
The Lubrication Unit
The Servo Fuel Heater
The Main Fuel Oil Heat Exchangers.
Indicating and Monitoring is provided by the Detectors and Sensors shown on
the Schematic.
Oil Supply Circuit
The Oil from the Tank passes through the Supply Pump and Supply Filter to
lubricate the forward and aft Sumps, and also the Accessorys and Gearboxes.
On the Oil Supply Line a Visual Filter Clogging Indicator, an Oil Temperatur
Sensor, an Oil Low Pressure Switch and an Oil Pressure Transmitter are provided for Indication and Monitoring.
Also an Oil Quantity Transmitter is provided on the Oil Tank.
Note the Installation of the ECU Oil Temperatur Sensor for the Fuel Return
Valve.
Oil Scavenge Circuit
The Oil from Bearings, Transfer Gearbox and Accessory Gearbox returns to
the Tank by means of four Scavenge Pumps protected upstream by Strainers
and Chip Detectors.
FRA US/T Bu July 1999
To keep Oil Temperatur within Limits, the Oil is cooled through the Servo Fuel
Heater and the Fuel/Oil Heat Exchanger.
In Case of Scavenge Filter Clogging, an Oil Differential Pressure (Delta P)
Switch signals it to the Cockpit and its Clogging Indicator shows it on the Engine system page with a message on E/WD accompanied by a single chime
Oil Vent Circuit
Some Air entrained in the Scavenge Oil is separated in the Tank by a Dearator
and is vented to the Forward Sump through the Transfer Gearbox and Radial
Drive Shaft.
The Sumps are vented Overboard through the Low Pressure Turbine Shaft to
prevet Overpressure in the Sump.
Air entrapped in the Scavenge Oil Pressurizes the Tank and provides adequate
Oil Pressure to the Supply Pump.
System Monitoring and Limitations
The operation of the engine oil system may be monitored by the following flight
deck indications.
engine oil pressure
engine oil temperature
- MIN.PRIOR EXCEEDING IDLE :
-100C
- MAX CONTINIOUS:
1400C
- MAX TRANSIENT:
1550C
oil tank contents
24 US quarts
In addition warnings may be given for the following non normal conditions:
low oil pressure
- RED LINE LIMIT:
13 PSI
high oil pressure
- ADVISORY:
90 PSI
scavenge filter clogged.
Page: Page: 78
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM 56-5A
79-00
ANTI SIPHON
DEVICE
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LOW OIL PRESSURE
SWITCH
OIL PRESSURE
TRANSMITTER
MAIN
SUPPLY FILTER
BY PASS VALVE
& CLOGGING IND.
For Training Purposes Only
COLD START
PRESSURE RELIEF VLV
RDS HOUSING
CLOGGING
SWITCH
SCAVENGE
FILTER
ECU OIL TEMP.
SENSOR
OIL TEMP.
SENSOR
SUPPLY
PUMP
ÁÁÁÁ
ÁÁÁÁ
PUMP SUPPLY
FRA US/T Bu July 1999
PRESSURE OIL
Figure 39
SCAVENGE OIL
VENT PRESSURE
OIL SYSTEM SCHEMATIC
Page: Page: 79
79-30
A319 / A320 / A321
CFM 56-5A
79-30
0IL INDICATING
DESCRIPTION
ECAM System Page
1.Oil Temperature Indication
Flashes Green ( Advisory ) when Temp 140° C
Is amber when155°C or 15min >140°C
2.Oil Pressure Indication
Color turns red (Warning ) when Pressure <13 PSI
3.Oil Quantity Indication
Flashes Green ( Advisory ) when QTY < 4 Quarts
4.Oil Filter Clog
(White and Amber )Warning appears on the Screen when the Engine
Scavenge Filter is Clogged
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
FRA US/T Bu July 1999
Page:Page:
Page: 80
Lufthansa Technical Training
ENGINE
OIL SYSTEM
3
2
1
A319 / A320 / A321
CFM 56-5A
79-30
F.USED
Kg
1300
11
0
1
psi
c
20
For Training Purposes Only
0
42
0
IGN
A B
35
Figure 40
FRA US/T Bu July 1999
20
qt
.5
100
1250
OIL
20
PSI
ENGINE
11
.4
N1
0.8
0.9
VIB
N2
1.2
1.3
4
100
0
VIB
OIL FILTER
CLOG
44
F. FILTER
20
34
CLOG
CLOG
CLOG
PSI
ECAM System Page
Page:Page:
Page: 81
Lufthansa Technical Training
ENGINE
OIL SYSTEM
CFM 56-5A
79-30
TEMPERATUR ENGINE OIL (TEO)
LOW OIL PRESSURE SWITCHING
This sensor is used for the IDG cooling system control(Fuel return).The oil temperature is sensed by a dual resistor unit. The unit consists of a sealed, wirewound resistance element(Chromel/alumel). This element causes a linear
change in the DC resistance when exposed to a temperature change.
Temperature measurement range :- 70 deg.C to 300 deg.C
Both signals (channel A and B) are routed to the ECU.
When the oil pressure drops down 13 PSID plus or minus 1 PSID (decreasing)
the pressure switch closes ; in result :
- The master warning (red) located on the glare shield comes on.
- The audio warning is activated
- The ENG page appears on lower display unit of the ECAM system :
Oil pressure indication flashes red.
- Warning messages appear on the upper display unit :
ENG1 (2) OIL LOW PRESS
THROTTLE 1 (2) IDLE
The low oil pressure information is send to different aircraft systems.
Two different switchings are possible:
OIL PRESSURE INDICATION
The analog signal from the oil pressure transmitter is sent to the SDAC1,
SDAC2 and the EIU which transforms the analog signal into a digital signal.
The digital signal is then transmitted to the ECAM through the FWCs and the
DMC.
OIL FILTER DIFFERENTIAL PRESSURE SWITCH
When the differential pressure through the oil scavenge filter is higher than
25.5 plus or minus 1 PSID increasing pressure, the switch closes.The signal is
send to the SDACs to the FWCs and the DMCs.In result :
- the MASTER CAUTION (amber) comes on
- ENG page on the lower display unit of the ECAM appears :
OIL FILTER CLOG indication (White and Amber)
OIL TEMPERATURE SENSOR
For Training Purposes Only
A319 / A320 / A321
The oil temperature is sensed by a dual resistor unit. This element causes a
linear change in the DC resistance when exposed to a temperature change.
Temperature measurement range :- 70 deg.C to 300 deg.C
Both signals (channel A and B) are routed to the EIU which transforms this
analog signal to a digital signal.The signal is send to the FWCs and DMCs and
then displayed on ECAM.
OIL QUANTITY TRANSMITTER
The oil quantity transmitter probe (tube portion) is a capacitor. The signal from
this capacitor is rectified and sent to the electronics assembly on top of the
transmitter.The analog signal is sent to the SDACs and EIU which transforms it
into a digital signal.The signal is sent to the FWCs.
The system is power supplied with 28VDC from busbar 101PP
(202PP),through circuit breaker 2EN1 (2EN2).
FRA US/T Bu July 1999
Low Oil Pressure Switching (via relay)
To Steering (32-51 )
Door Warning (52-73 )
To FWC (31-52 )
FAC (22- )
TO FMGC (22-65 )
To IDG SYSTEM CONTROL( 24- 21 )
Low Oil Pressure Switching via EIU
To CIDS (23-73 )
To DFDRS INTCON Monitoring (31-33)
To CVR power Supply (23-71 )
To Avionics Equipment Ventilation (21-26 )
To WHC (30-42 )
To PHC ( 30-31 )
To FCDC (27-95)
To Blue Main Hydraulik PWR( 29-12)
To Green Main HYD PWR RSVR Indicating (29-11)
To Yellow Main HYD PWR RSVR Indicating (29-13 )
To Blue Main HYD PWR RSVR Warning / Indicating (29-12)
Page:Page:
Page: 82
A319 / A320 / A321
CFM 56-5A
79-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
Figure 41
FRA US/T Bu July 1999
Basic Schematic
Page:Page:
Page: 83
Lufthansa Technical Training
ENGINE
OIL SYSTEM
79-00
A319 / A320 / A321
CFM56-5A
79-00
OIL SYSTEM COMPONENTS
OIL TANK
The tank is located on the left side of the fan case at the 8 o’clock position, and
above the main oil/fuel heat exchanger.The oil tank is attached to the fan frame
at 3 points.It is a fabricated light alloy weldment.The tank is treated externally
with a flame-resistant coating to meet fireproof requirements
Features:
oil qty. transmitter
pressure and gravity fill ports
sight glass for level indication
static air and oil separator
magnetic drain plug
oil scupper to drain oil spills during filling
Oil Tank Pressurization and Venting
In normal operation, the tank is pressurized by the air included in the scavenge
oil. The pressurizing air in the tank is up to 0.8 bar above the external pressure.The oil-in tube port discharges tangentially into a cavity connected with the
tank vent and directing the air/oil mixture to a static air/oil separator.
During engine shut down, the pressurizing air is vented overboard, thus enabling the oil level to be checked five to thirteen minutes after engine shut down
by opening the gravity filler cap or by looking at the cockpit indication.
The tank is vented to the forward sump through the transfer gearbox and radial
drive shaft housing. Thus, oil tank pressure is adequate to provide pressurization of the supply pump inlet.
When engine N2 RPM increases from idle to take-off the quantity of oil in the
tank may decrease to between 6 US Quarts (5.7 liters) and 8 US Quarts
(7.6 liters) due to gulping effect.
Oil Tank Characteristics
US Quarts
Liters
2.5
2.35
Max gulping effects
8
7.56
Min useable oil volume
10
9.46
21,9
20.7
24
22.7
Max Unuseable Quant.
Max oil total capacity
For Training Purposes Only
Total tank volume
ENGINE OIL SERVICING
Wait and let the pressure in the tank decrease for at least 5 minutes after engine shut down,before opening the filler cap.
In case of using the pressure fill port,open also the overflow port to make sure
that the oil system will not be overfilled.The correct level can be checked on the
sight glass.
NOTE:
The oil system can be refilled any time.
Minimum Oil QTY on ground ( ECAM INDICATION)
Before engine start:
11 quarts + estimated consumption (0,3qts/h)
Engine at ground idle:
5 quarts + estimated consumption (0,3qts/h)
FRA US/T Bu
JULY1999
Page: 84
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM56-5A
79-00
SERVICING PORTS
For Training Purposes Only
Full Mark
Sight Gage
Figure 42
FRA US/T Bu
JULY1999
Overflow
Filling
Port
Filler Cap
Remote
Filling
Port
Oil Tank
Page: 85
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM56-5A
79-00
LUBRICATION UNIT
General
The lubrication unit provides oil under the required pressure for lubrication
and for scavenge of the oil after lubrication and circulation to the oil/fuel heat
exchanger and oil tank. The lubrication unit its mounted on the AGB front face.
Description
The lubrication unit has a single housing containing the following items :
Five positive displacement pumps( Gear Type, one oil supply and 4 scavenge pumps).
Six filters (one oil supply filter, 4 chip detectors and scavenge pump filters).
One relief valve (305 psi, on oil supply pump discharge side).
Two clogging indicators (one for the oil supply filter and one for the main
scavenge filter).
Two bypass valves (one for the oil supply filter and one for the main scavenge filter).
Scavenge filter
The flows from the 4 scavenge pumps are mixed together at the scavenge
common filter inlet. This filter assembly consists of the following :
One 25 micron filter
One clogging indicator, similar to the one on the supply filter (2 bars to 2.3
bars) (29 PSID to 33 PSID).
An upstream and a downstream provision for measurement of filter pressure loss as a function of clogging.Filter clogging is indicated on the ECAM
system.
One bypass valve which opens if the filter clogs.(2.5 bars to 2.7 bars) (36
PSID to 39PSID)
For Training Purposes Only
Anti siphon System
The supply lines from the oil tank to supply the pump has an antisiphon device
to prevent the drainage of the lube tank into the gearboxes and sumps when
the engine is shut down for extended periods.
Lube pump supply filter
Downstream of the supply pump, the oil flows through the supply filter
assembly. The filter has the following components.
One filter (15 microns)
One clogging indicator subjected to the upstream and downstream pressures of the supply filter.The indicator has a red warning indicator and is
rearmed manually (2 bars to 2.3 bars) (29 PSID to 33 PSID).
One bypass valve which opens if the supply filter clogs (2.50 bars to 2.70
bars) (36 PSID to 39 PSID).
Two capped provisions for a pressure gage upstream of the filter,and a temperature sensor.
FRA US/T Bu
JULY1999
Page: 86
A319 / A320 / A321
CFM56-5A
79-00
TEMPERATUR SENSOR
POSITION
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
LUBRICATION UNIT
A
Figure 43
FRA US/T Bu
JULY1999
Lubrication Unit
Page: 87
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM56-5A
79-00
CHIP DETECTORS
The oil which has lubricated the engine bearings, accessory gearbox and
TGB is scavenged by 4 pumps protected by a strainer equipped with a
magnetic chip detector.
The air/oil mixtures are passed through the chip detectors and the scavenge
filters, and then to the specific scavenge pump.
4 Chip Detectors installed on the Lube unit:
TGB Scavenge Chip Detector
AGB Scavenge Chip Detector
AFT Sump Scavenge Chip Detector
FWD Sump Scavenge Chip Detector
Chip Detector Removal
Chip detector assembly can be removed by depressing it and rotating it one quarter of a turn counter-clockwise (CCW)
For Training Purposes Only
Chip Detector Installation
Align plug keys of magnetic plug with sleeve keyways and rotate a quarter of a
turn clockwise to complete engagement of keys in keyways.
Ensure chip detector and magnetic plug assembly has snapped down into its
lock position by pulling detector down,while lightly rotating from side to
side.Flats of handle must be perpendicular to the centerline of lube unit.Magnetic plugs are provided with a red point on plug handle.The red point must
face the filters.
FRA US/T Bu
JULY1999
Page: 88
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM56-5A
79-00
FWD
AFT
AGB
TGB
SCAVENGE
FILTER
NON REMOVABLE
SEAL
LOCKING PIN
For Training Purposes Only
MAGNETIC ROD
O-RING
Chip Detector
Figure 44
FRA US/T Bu
JULY1999
STRAINER
Chip Detectors
Page: 89
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM56-5A
79-00
MAIN FUEL OIL HEAT EXCHANGER
SERVO FUEL HEATER
Purpose:
The oil/fuel heat exchanger cools the oil by using fuel as a cooling medium.
The oil to fuel heat transfer is achieved through conduction and convection
within the exchanger where both fluids are circulated.Fuel from the fuel pump
and from HMU enters the inlet.
Oil from the scavenge system enters the oil inlet.
Purpose:
The servo fuel heater raises the temperature of the fuel. This prevents ice from
entering the control servos inside the hydromechanical fuel unit (HMU).
Location:
The oil/fuel heat exchanger is installed on the fuel pump, between the AGB aft
face and the servo fuel heater at the 9 o’clock position, aft looking forward.
Description
The servo fuel heater is a heat exchanger using oil as its heat source.
Heat exchange between oil and fuel occurs by conduction and convection
inside the unit. The 2 fluids circulate in the servo fuel heater through
separate flowpaths.
For Training Purposes Only
Description
The oil/fuel heat exchanger is of tubular type. It consists of a
removable core, housing and cover.
The housing contains the core of the oil/fuel heat exchanger.The following
items are located on the outside of the oil/fuel heat exchanger housing :
One oil pressure relief valve and one fuel pressure relief
valve.
One drain port which collects possible fuel leaks from core and inner seal
cavities and prevents fuel from leaking into the oil cavity and contaminating
the oil system.
One attaching flange for the servo fuel heater.
One flange for attachment to the fuel pump.
One port on fuel-in for fuel returned from HMU after circulating through the
IDG oil cooler.
Location
The servo fuel heater is mounted on the aft section of the main oil/fuel heat
exchanger located on the accessory gearbox (AGB) aft face, between the oil
tank and the fuel pump/HMU package.
FRA US/T Bu
JULY1999
Page: 90
A319 / A320 / A321
CFM56-5A
79-00
FUEL to HMU
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
Figure 45
FRA US/T Bu
JULY1999
Main Fuel Oil Heat Exchanger
Page: 91
Lufthansa Technical Training
ENGINE
OIL SYSTEM
79-30
A319 / A320 / A321
CFM 56-5A
79-30
0IL INDICATING COMPONENTS
OIL PRESSURE TRANSMITTER
The oil pressure transmitter is located on the lubrication unit outlet line.
- Power supply : 28VDC from busbar 202PP.
- Pressure range : 0 to 100PSID.
- Output voltage : 1VDC to 9VDC varying linear with pressure from 0 to
100PSID.
Operation
The pressure transmitter operates on the principle of measuring a pressure
by sensing the strain induced in a mechanical element, (in this case a dual
cantilever beam). Deflection of the beam causes a change in resistance in
the four strain gages connected as a wheatstone bridge.
These resistance changes result in a DC output voltage which is
proportional to the applied pressure.
LOW OIL PRESSURE SWITCH
For Training Purposes Only
The low oil pressure switch is located on the lubrication unit outlet line.
Actuation of the low pressure switch is at :
16 PSID increasing pressure
13 PSID plus or minus 1 decreasing pressure
FRA US/T Bu July 1999
Page:Page:
Page: 92
A319 / A320 / A321
CFM 56-5A
79-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
Figure 46
FRA US/T Bu July 1999
Oil Press. & Low Oil Press.
Page:Page:
Page: 93
Lufthansa Technical Training
ENGINE
OIL SYSTEM
A319 / A320 / A321
CFM 56-5A
79-30
OIL QUANTITY TRANSMITTER
TEMPERATUR ENGINE OIL (TEO)
The oil quantity transmitter is located in the oil tank.
The oil quantity transmitter probe (tube portion) is a capacitor formed by two
concentric tubes.
This sensor is used for the IDG cooling system control(Fuel return).The oil temperature sensor is installed on the No. 1 and 2 bearing oil supply tube.
For Training Purposes Only
Transmitter specification :
Output voltage : 1VDC to 9VDC varying linearly with true oil quantity from 1.4
to 24 quarts
Accuracy : plus or minus 0.5 quarts
FRA US/T Bu July 1999
Page:Page:
Page: 94
A319 / A320 / A321
CFM 56-5A
79-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
Figure 47
FRA US/T Bu July 1999
TEO & OIL QTY Transmitter
Page:Page:
Page: 95
A319 / A320 / A321
CFM 56-5A
79-30
OIL FILTER DIFFERENTIAL PRESSURE SWITCH
OIL TEMPERATURE SENSOR
The oil differential pressure switch is located on a bracket on the engine above
the scavenge filter. Lines are routed to the switch from bosses on the scavenge
filter.
Actuation of the differential pressure switch is at :
25.5 plus or minus 1 PSID increasing pressure 22 PSID decreasing pressure.
The oil temperature sensor is located on the oil pressure filter downstream of
the pressure pump.The oil temperature is sensed by a dual resistor unit.
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
FRA US/T Bu July 1999
Page:Page:
Page: 96
A319 / A320 / A321
CFM 56-5A
79-30
For Training Purposes Only
Lufthansa Technical Training
ENGINE
OIL SYSTEM
Figure 48
FRA US/T Bu July 1999
Temp. Sensor & Diff. Press. Switch
Page:Page:
Page: 97
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
GENERAL
ATA 73
ENGINE FUEL AND CONTROL
73-00
FUEL SYSTEM PRESENTATION
CFM 56-5A
73-00
ENGINE FUEL SYSTEM DESCRIPTION
General
The engine fuel system is designed to provide fuel flow into the combustion
chamber and servo fuel for compressor and engine clearence system actuation.
Fuel Feed
The fuel coming from the aircraft tanks supplies the main fuel pump and is
heated by the engine oil scavenge line before entering into the hydromechanical unit ( HMU ).
A fuel differential pressure switch provides indication to the cockpit if the filter is
clogged.
For Training Purposes Only
A319 / A320 / A321
Metered Fuel
The fuel from the main pump passes through a fuel metering valve and HP fuel
shut-of f valve included into the hydromechanical unit which provides the fuel
flow to the nozzles.
A burner staging valve controlled by ECU supplies either 10 or 20 nozzles at
lower or higher power.
The fuel metering valve is controlled by the ECU and provides the adequate
fuel flow.
The fuel flow is measured by a flow meter for the cockpit indication.
The LP and HP Fuel shut off valves closes when the ENG MASTER lever is
set to OFF.
Servo Fuel
Filtered fuel from the wash filter passes through a servo-fuel heater and to the
servo valves of the hydromechanical unit and the fuel return valve.
In the hydromecanical unit the servo valves are hydraulically driven through
torque motors by the ECU to provide the operations of:
-
Rotor Active Clearance Control ( RACC ) (not installed on new engines)
HP Turbine Clearance Control ( HPTACC )
LP Turbine Clearance Control ( LPTACC )
Burner Staging Valve
Fuel Metering Valve
Fuel Return
A part of the fuel is recovered to provide IDG oil cooling before returning to the
fuel circuit at the LP pump stage. When the thermal exchange is not sufficent,
the fuel return valve will be opened by the ECU, according to a given temperature.
Wen the engine oil temperature exceeds 93 degrees C the ECU sends a signal
to open the fuel return valve. The signal is inhibited at Take-Of f, Climb and
when the A/C tank temperatures are high or there is fuel in the vent tank. A
hydraulic signal from the HP fuel SOV closes the valve at engine shutdown.
ECU Control
The ECU sends electrical signals to the torque motor servovalves of both the
HMU and the fuel return valve. Thus, it provides the commanded position for
the slave systems.
For each valve of VBV, VSV, RACC, HPTACC, LPTACC, and fuel systems the
ECU has a control schedule. If a schedule is no longer operational, the corresponding valve goes to a fail safe position. For example: VBV open, VSV
close, burner staging valve opens, fuel metetring valve closes ( engine shutdown ).
- Variable Stator Vanes ( VSV )
- Variable Bleed Valves ( VBV )
FRA US/E Bu Jan.95
Page: Page: 98
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
GENERAL
FLSCU
A319 / A320 / A321
CFM 56-5A
73-00
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SV
(not installed on new engines)
SV
SV
SV
SV
For Training Purposes Only
SV
ÉÉÉÉ
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MAIN STREAM
SV SERVO VALVE
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HMU BYPASS
Figure 49
FRA US/E Bu Jan.95
ËËË
ËËË
HOT RETURN
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FUEL FLOW
TRANSMITTER
COLD RETURN
Fuel System Schematic
Page: Page: 99
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Engine Fuel and Control
Distribution
73-10
A319 / A320 / A321
CFM 56-5A
73-10
FUEL DISTRIBUTION COMPONENTS
FUEL PUMP
The fuel pump and HMU are mounted as a unit.
The fuel pump drive system consists of the following :
Fuel pump LP stage
The LP stage of the fuel pump is of the centrifugal type. It delivers a boost
pressure to the HP stage to avoid pump cavitation.
The LP stage general characteristics at takeoff power are as follows :
Discharge pressure : 174 psi (1200 kPa).
Speed rating : 6250 RPM.
Fuel pump HP stage
The HP stage hydraulic power is supplied by a positive displacement (geartype) pump. For a given number of revolutions, the pump delivers a constant
fuel flow regardless of the discharge pressure.
A pressure relief valve connected in parallel with the HP pump protects the
pump.
The HP stage general characteristics at takeoff power are as follows :
Discharge pressure : 870 psi (6000 kPa)
Speed rating : 6250 RPM
Fuel flow : 57 US gal/min. (13000 l/h).
For Training Purposes Only
Location
The fuel pump is located on the accessory gearbox (AGB) (aft face on the left
side of the horizontal drive shaft housing, aft looking forward).
FRA US/E Bu July 1999
Page: Page: 100
A319 / A320 / A321
CFM 56-5A
73-10
FUEL PUMP
HMU
For Training Purposes Only
Lufthansa Technical Training
Engine Fuel and Control
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Figure 50
FRA US/E Bu July 1999
Fuel Pump & Fuel Filter
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A319 / A320 / A321
CFM 56-5A
73-10
FUEL FILTER
FUEL FILTER DIFF PRESSURE SW.
General
The fuel filter protects the HMU from particles in suspension in the fuel.
The fuel filter consists of a disposable filter cartridge and a pressure relief
valve. The filter cartridge is installed in a cavity on the pump body.
The fuel circulates from the outside to the inside of the filter cartridge.
In case of a clogged filter, a pressure relief valve bypasses the fuel to the HP
stage.
The fuel filter differential pressure switch is located on the fan case.
The switch sends a signal to the SDAC when the differential pressure increases to a certain level when the fuel filter clogs.
The fuel filter clog indication is provided on the lower ECAM display unit.
For Training Purposes Only
Location
The fuel filter is located between the main oil/fuel heat exchanger and fuel
pump HP stage.
FRA US/E Bu July 1999
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A319 / A320 / A321
CFM 56-5A
73-10
FUEL FILTER DIFF. PRESS. SW.
FUEL FILTER
HCU
For Training Purposes Only
FUEL FILTER
DRAIN PLUG
FUEL FILTER DIFF. PRESS. SW.
Figure 51
FRA US/E Bu July 1999
Fuel Filter
Page: Page: 103
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Engine Fuel and Control
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A319 / A320 / A321
CFM 56-5A
73-10
HYDROMECHANICAL CONTROL UNIT
General
The hydromechanical unit (HMU) is installed on the aft side of the
accessory gearbox at the extreme left hand pad.
It receives electrical signals from the electronic control unit (ECU) and converts
these electrical input signals through torque motors/servo valves into enginefuel flow and hydraulic signals to various external systems.
Engine fuel is used as hydraulic media.
For Training Purposes Only
NOTE:
No maintenance adjustments (eg. idle,part power etc.) can be performed
at the HMU!
FRA US/E Bu July 1999
Page: Page: 104
A319 / A320 / A321
CFM 56-5A
73-10
For Training Purposes Only
Lufthansa Technical Training
Engine Fuel and Control
Distribution
Figure 52
FRA US/E Bu July 1999
HMU
Page: Page: 105
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Engine Fuel and Control
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A319 / A320 / A321
CFM 56-5A
73-10
FUEL METERING OPERATION
The HMU is divided in the following systems:
Servo Pressure Regulator System
Fuel Metering System
Overspeed Governor System
Pressurizing Valve (HP Fuel SOV)
Pump Unloading and Shutdown System
Servo Flow Regulation System.
Fuel Metering Valve
The fuel metering valve is hydraulically driven through a torque motor/ servo
valve by the ECU. The torque motor contains two electrically isolated, independent coils, one dedicated to Channel A,the other to Channel B of the ECU.
Two fuel metering valve position resolvers, one dedicated to each channel in
the ECU, produce an electrical feedback signal in proportion to fuel metering
valve position. The ECU uses this signal to compute the current required at the
fuel metering valve torque motor for achieving closed loop electrical control.
At engine shutdown the Metering valve is completly closed.
Overspeed governor
The overspeed governor is of the fly ball type. It is designed to prevent the engine from exceeding a steady state speed in excess of 106.3% N2.
A pressure switch sends a signal to the ECU if the overspeed governor fails
when the engine is started (OVSPD Protection fail)
Motive flow modulation
The HMU contains 5 additional torque motors/ servo pilot valves that modulate
hydraulic signals to the following :
1 - Low Pressure Turbine Clearance Control Valve
2 - High Pressure Turbine Clearance Control Valve
3 - Rotor Active Clearance Control System (not installed on new engines)
4 - Variable Stator Vane Actuators
5 - Variable Bleed Valve Actuators.
Each torque motor contains two electrically isolated, independent coils.
One is dedicated to channel A, the other to channel B, of the ECU.
They provide flow and pressure at an HMU pressure port in response to electrical commands from the ECU.
For Training Purposes Only
Delta P Valve
A differential pressure regulating valve maintains a constant pressure drop
across the metering valve. As a result, fuel flow varies proportionally with metering valve position.
High Pressure Fuel shut-off valve
The valve is driven by a solenoid. The Valve closed / not closed position is indicated to the ECU by two electrical limit switches.
The fuel shut off valve shuts off fuel flow to the engine commanded by the
master switch (solenoid energized by aircraft 28VDC from busbar 3PP).
The HP fuel shut off valve is open when all three following conditions are met :
- command to open from A/C (soleinoid de-energized)
- engine rotation speed above 15% N2
- fuel pressure.
NOTE:
It has to be noted that the HP fuel shut off valve shut off signal by the
Master switch also closes the LP fuel valve.
FRA US/E Bu July 1999
Page: Page: 106
A319 / A320 / A321
CFM 56-5A
73-10
For Training Purposes Only
Lufthansa Technical Training
Engine Fuel and Control
Distribution
Figure 53
FRA US/E Bu July 1999
HMU
Page: Page: 107
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CFM 56-5A
73-10
HP & LP FUEL SOV CONTROL
The HP fuel shut off valve control is fully electrical. It is performed from the engine panel in the cockpit as follows :
Opening of the HP fuel SOV :
it is controlled by the ECU : the ECU receives the commands from the
MASTER control switch and mode selector switch.
Closure of the HP fuel SOV :
it is controlled directly from the MASTER control switch in OFF position
HP Fuel Shut Off Valve Control
The FADEC control system contains two fuel shut-off means, which act
through pilot valves to close the high pressure fuel shut off valve.
A fuel shut-off which is direct-hardwired to the MASTER control switch.
This solenoid operated pilot valve is powered by the 28VDC.It is closed when
energized.
When the metering valve is positioned below a minimum fuel flow position a
mechanically operated pilot valve in the HMU closes the pressurizing valve.
This function is software logic inhibited to prevent operation at and above idle
operation.
The fuel shut off valve meets the following concepts.
For Training Purposes Only
A319 / A320 / A321
LP Fuel Shut Off Valve Control
The function of the LP fuel shut-off valve is to control the fuel supply at engine-to-pylon interface.
The valve is located on the engine supply system in the wing leading edge.
Valve Operation
The LP fuel shut off valve is controlled :
From the flight compartment overhead panel by means of the ENG FIRE
pushbutton switch
From the flight compartment center pedestal by means of the MASTER
control switch on engine control panel.
NOTE:
It is commanded open via the relay 11QG when the C/B of the HP Fuel
SOV is pulled.
The pressurizing valve does not actuate open with boost pressure (even if
both pilot valves call for ”ON”) until the HP fuel pump provides sufficient
pressure to open it.
Loss of power supply does not lead to change the selected HP fuel
shutoff valve position.
When HP fuel shutoff valve is selected closed (open) a spurious transient
voltage to open (close) does not lead to a permanent opening (closure) of
the fuel valve
The cockpit commanded OFF coil has priority over the ECU command.
The cockpit control interfaces directly with the HP fuel shut-off
solenoid. The valve contains a coil which operates the HP shut-off
closed when energized. The solenoid is of a latching type. It latches
either open or closed until a reversing signal is applied. The open
function is an hydraulic trip with a magnetic latch. A closed signal
has priority.
FRA US/E Bu July 1999
Page: Page: 108
A319 / A320 / A321
CFM 56-5A
73-10
For Training Purposes Only
Lufthansa Technical Training
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Figure 54
FRA US/E Bu July 1999
HP Fuel SOV Control
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ENGINE FUEL AND CONTROL
FUEL DISTRIBUTION
CFM56-5A
28-20
The engine fuel supply system has two fuel shut off valves.
one PRSOV in the HMU
One LP - fuel shut off valve on the front wing spar.
LOW PRESSURE FUEL SHUT OFF VALVE
For Training Purposes Only
A319/A320/321
The LP fuel - valve 12QM ( 13QM ) is in the fuel supply line to its related
engine. The LP fuel - valve is usually open and in this configuration lets fuel
through to its related engine. When one of the LP fuel - valves is closed, the
fuel is isolated from that LP fuel valve’s related engine.
The LP fuel - valve is installed between the engine pylon and the front face of
the wing front spar ( between RIB 8 and RIB 9 ).
Each LP valve has an actuator 9QG ( 10QG ). The interface between the
actuator and the LP valve is a valve spindle. When the actuator is energized, it
moves the LP valve to the open or closed position. A V - band clamp
80QM(81QM) attaches the actuator to the LP valve.
Each actuator has two motors, which get their power supply from different
sources :
- the 28VDC BATT BUS supplies the motor 1
- the 28VDC BUS 2 supplies the motor 2.
If damage occurs to the electrical circuit, it is necessary to make sure that the
valve can still operate. Thus the electrical supply to each motor goes through a
different routing. The routing for motor 1 is along the front spar.
The routing for motor 2 is along the rear spar and then forward through the
flap track fairing at RIB 6.
The actuators send position data to the System Data - Aquisition C
oncentrators ( SDAC1 and SDAC2 ). The SDACs process the data and send it
to the ECAM which shows the information on the FUEL page.
FRA US / T Bu July 1999
Component Description
The LP fuel - valve has:
- a valve body
- a ball valve
- a valve spindle
- a mounting flange.
The LP fuel - valve actuator has two electrical motors which drive the same
differential - gear to turn the ball valve through 90 deg. The limit switches in
the actuator control this 90 deg. movement and set the electrical circuit for the
next operation. One of the two motors can open or close the valve if the other
motor does not operate.
The actuator drive shaft has a see/feel indicator where it goes through the
actuator body. The see/feel indicator gives an indication of the valve
position without removal of the fuel LP fuel valve.
Page: 110
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ENGINE FUEL AND CONTROL
FUEL DISTRIBUTION
A319/A320/321
CFM56-5A
28-20
V-Clamp
For Training Purposes Only
ELECTRICAL CONNECTORS
Figure 55
FRA US / T Bu July 1999
LP Fuel Shut-Off Valve
Page: 111
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CFM 56-5A
73-10
FUEL RETURN SYSTEM COMPONENTS
General Description
Oil/Fuel Temperature Control
The IDG oil shall be cooled by engine fuel through an oil/fuel heat exchanger
which is installed in the fuel bypass line.
For some aircraft operation, extra heat rejected in fuel shall be carried out of
the engine fuel system through the valve fuel return valve (FRV) in order not to
exceed defined temperature limits (either engine fuel/oil temperature or IDG oil
temperature) .
FADEC performs this temperature control using the engine oil temperature and
engine fuel measurement.
FADEC hase two actions depending upon the temperature values and the aircraft flight conditions :
command the FRV in order to permit a fuel return to the aircraft tank
increase the engine speed when oil temp is 106 deg. C.(which leads
to decrease the temperature of the cooling fuel flow).
This function is inhibited when the aircraft is on ground.
FUEL RETURN VALVE
The purpose of the fuel return valve is to return fuel flow to the tank.
The return fuel flow is controlled at the IDG oil cooler outlet by :
the engine oil temperature ( signal from TEO )
the fuel temperature
For Training Purposes Only
A319 / A320 / A321
Shut Off Function
The fuel return valve has a shutoff function when the engine is shutdown.
(solenoid de-energized) from the ENG/MASTER control switch .
The signal transits through the Arinc bus and ECU and overrides the engine ”oil
in” temperature command.
In case of high fuel flow conditions the electrical open signal is overrided by a hydraulic signal from the HMU and the shutoff valve is closed.
A ”close” command from the HMU interrupts both fuel flows to the aircraft
FRA US/E Bu July 1999
N2
APPROACH
IDLE
In Flight only!
min. IDLE
106
128
ENG. OIL TEMP. (C)
The Fuel Level Sensing Control Unit (FLCSU) sends also FRV-Inhibition
signal to the ECU, if:
Fuel Tank Temp. high
Low Fuel Level in the Tanks
Fuel in Surge Tank
Gravity Feed .
Page: Page: 112
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A319 / A320 / A321
CFM 56-5A
73-10
B
FUEL RETURN VALVE
A
For Training Purposes Only
B
A
ECU CONN.
ECU OIL TEMP SENSOR
(TEO)
Figure 56
FRA US/E Bu July 1999
Fuel Return System
Page: Page: 113
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Engine Fuel and Control
Distribution
A319 / A320 / A321
CFM 56-5A
73-10
FUEL RETURN VALVE
Operation
The fuel return valve controls 2 flow levels :
The first level (300 kg/h) is controlled by the engine ”oil in” temperature when
the temperature is higher than 93 deg C.
The V1 solenoid valve is energized by the electronic control unit (ECU) .
The second level (which adds approximately 300 kg/h to the first flow level) is
controlled by the IDG oil cooler ”fuel out” temperature when higher than130 deg
C (269 deg F).
The V2 thermostatic valve is controlled by the ”fuel out” temperature.
Return fuel temperature limitation.
The fuel return valve mixes :
- a cold fuel flow (from the engine LP fuel pump) with
- the hot fuel flow (calibrated to maintain a temperature of 214 deg F
(100 deg C) in the return line.
The mix is as follows:
Fuel out temp. below 130 deg C- 200 kg/h cold flow with 300 kg/h hot flow.
Fuel out temp. above 130 deg C- 400 kg/h cold flow with 600 kg/h hot flow.
A signal from the ENG/MASTER control switch to FADEC permits to override
the V1 opening signal if :
Engine oil temperature is higher than 93 deg C during take off or climb or
specific operating conditions .
A hydraulic signal from the HP fuel shutoff valve closes the V1 valve at engine shutdown.
Note:
A functional check ( refer. to AMM 73-11-50) of the fuel return valve can only
be done with a engine idle run.
A test set is used to simulate a temperature >93 deg. C.
Also a flow gage must be fitted in the fuel return line.
When the valve opens the gage indicates a positive reading (fuel returns
to tank).
FRA US/E Bu July 1999
Page: Page: 114
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Engine Fuel and Control
Distribution
OIL TEMP.
T < 93C
A319 / A320 / A321
CFM 56-5A
73-10
IDG COOLER FUEL
TEMP.
HOT FUEL FLOW
RETURN
-
COLD FUEL FLOW
RETURN
0
0
TOTAL FUEL RETURN
TO TANK
0
T > 93C
T < 130C
300 Kg/h
200 Kg/h
500 Kg/h
T > 93C
T > 130C
600 Kg/h
400 Kg/h
1000 Kg/h
Figure 57
FRA US/E Bu July 1999
Fuel Return Valve
Page: Page: 115
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A319 / A320 / A321
CFM 56-5A
73-10
IDG FUEL COOLED OIL COOLER
Purpose:
The purpose of the cooler assembly is to cool oil coming from the Integrated
Drive Generator (IDG). The heat generated is transfered to the fuel coming
from the HMU and returning to the oil/fuel heat exchanger.
Description
The oil cooler is of tubular type. It consists of a removable core,housing and
cover.
A fuel pressure relief valve is connected in parallel with the fuel inlet and outlet
ports.
Oil system
The oil circulates through the stainless steel tube bundle brazed at both ends.
This extracts the calories and transfers them to the engine fuel. The oil outlet
temperature varies between (-54 deg C and 160deg C).
Fuel system
The fuel circulates inside the tubes that evacuate the calories released by the
oil.If the pressure drop inside the heat exchanger core increases :
- the pressure relief valve opens and bypasses the heat exchanger core.
For Training Purposes Only
Location
The IDG oil cooler is located on the front face of the AGB at 5:30 o’clock position, aft looking forward.
FRA US/E Bu July 1999
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A319 / A320 / A321
CFM 56-5A
73-10
For Training Purposes Only
FAN INLET CASE
Figure 58
FRA US/E Bu July 1999
IDG oil Cooler
Page: Page: 117
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Engine Fuel and Control
Distribution
A319 / A320 / A321
CFM 56-5A
73-10
BURNER STAGING VALVE
Purpose:
The purpose of the Burner Staging Valve (BSV) is to shutoff 10 of the 20 fuel
nozzles as commanded by the ECU .
The burner staging valve stages on 10 nozzles when a lower Fuel Air Ratio
(FAR) is required by the ECU. This ensures that there is adequate deceleration
capability in the deceleration schedule.
The 10 nozzles are also switched off to maintain a adequate flame out margin.
Note:
10 fuel nozzles are always on when the engine is in operation.
Description and Operation
The BSV is a poppet type shutoff valve that is opened or closed by fuel pressure (PC or PCR) from the HMU based on ECU logic.
The main poppet valve allows metered fuel delivery to the staged manifold and
under most conditions is set to the open (unstaged) position to assure that all
20 fuel nozzles are used at the following power operations:
-N2K > 80%
-Approach Idle
-BSV Feedback Signal Failure
- ECU or HMU Command signal failed it is opening by hydraulic
pressure at 200-300 psi .
Dual switches in the BSV monitor the position of the valve and transmit a feedback indication to the ECU. The switches are open when the valve is open (unstaged).
After the ECU logic has determined that a lower FAR is required, the BSV is
staged to 10 nozzles through the HMU BSV solenoid.
If the ECU receives a valid signal from the BSV feedback switches that the
BSV did stage, the ECU then lowers the FAR in the deceleration schedule to
ensure a constant rate of engine deceleration.
In operating conditions where a low FAR is required, the design of the fuel
nozzles provides the necessary spray pattern to ensure that the engine will
decelerate properly and that adequate flame out margin is maintained.
FRA US/E Bu July 1999
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A319 / A320 / A321
CFM 56-5A
73-10
A
For Training Purposes Only
A
ECU CONN.
CHAN. A/B
FEEDBACK
SIGNAL
Figure 59
FRA US/E Bu July 1999
BURNER STAGING VALVE
Burner Staging Valve
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A319 / A320 / A321
CFM 56-5A
73-10
FUEL NOZZLES
FUEL MANIFOLD
Purpose:
The fuel nozzles are installed into the combustion case assembly. They are
connected to the fuel manifold assembly. The 20 fuel nozzles deliver fuel into
the combustor in a spray pattern. This provides good light-off and efficient
burning at high power.
Purpose:
The fuel manifold supplies metered fuel to the twenty fuel nozzles and drains
any fuel that may leak from the fuel supply connection lines.
For Training Purposes Only
Operation
The fuel nozzles contain both primary and secondary fuel flow passages.
As the engine is started :
- the fuel passes through the inlet, and
- accumulates in the portion of nozzle that houses the valves.
The low pressure primary flow :
- is directed through the check valve
- passes through the primary passage of the nozzle tube and tip,
- enters the combustion chamber as an uniform density spray
The high pressure secondary flow activates the flow divider valve.
This fuel passes through the secondary passage of the nozzle tube and tip.
Then it enters the combustion chamber as an uniform density, cone shaped
spray. The cone of the secondary spray is wider than that of the primary,
therefore, surrounding the primary spray pattern.
Description and Operation
The fuel manifold consists of a manifold supplying fuel to ten fuel nozzles that
is unstaged or staged (depending on BSV position), a staged manifold that always supplies fuel to the remaining ten fuel nozzles when the engine is in operation, and a drain manifold. Fuel nozzles on the two fuel manifolds are located in an alternating pattern. Each manifold is divided into two segments
joined by connecting nuts at the 6 and 12 o’clock positions.
The fuel supply manifold halves are connected to supply lines from the BSV
at the 5 and 6 o’clock positions. Each of the connections has individual
drain lines. This fuel supply splitting limits fuel pressure drop across lines and
facilitates removal/installation operations.
A drain function is performed at each fuel nozzle connection by a shroud
sealed by two o-rings. The shrouds are connected to the main drain manifold
by fifteen integral and five removable drain lines. The five removable drain
tubes are to facilitate access to borescope ports. A drain line connected to the
aircraft drain mast is attached to the drain manifold at the 7 o’clock position.
FRA US/E Bu July 1999
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CFM 56-5A
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Fuel Nozzle Arrangement
Figure 60
FRA US/E Bu July 1999
Fuel Nozzles
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Engine Fuel and Control
Fuel Indicating
73-30
A319 / A320 / A321
CFM 56-5A
73-30
ENGINE FUEL INDICATING
FUEL FLOW TRANSMITTER
General
The fuel flow transmitter is installed in the fuel line between the HMU and the
burner staging valve. It is mounted on the lower left-hand side of the fan case,
rearward of the LP/HP fuel pump.
The fuel flow transmitter is made of these primary assemblies:
- the transmitter body,
- the inlet fitting and clamps
- the turbine assembly,
- the measurement assembly.
FUEL FLOW INDICATION, FUEL USED
The Fuel Flow Transmitter is installed at the HMU. The signals are routed to the
ECU and via the DMCs to the ECAM.
For Training Purposes Only
The Fuel Used-is calculated in the DMCs .
FRA US/E Bu July 1999
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Fuel Indicating
A319 / A320 / A321
CFM 56-5A
73-30
UPPER
ECAM
DISPLAY
For Training Purposes Only
LOWER
ECAM
DISPLAY
Figure 61
FRA US/E Bu July 1999
Fuel Flow /Fuel Used Indication
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Fuel Indicating
A319 / A320 / A321
CFM 56-5A
73-30
FUEL FILTER CLOGGING INDICATION
FAN FRAME 1000 O’CLOCK POSITION
The fuel filter clogging switch is installed at 10 o‘ clock position at the L/H fan
frame.
FUEL FILTER CLOGGING SWITCH
For Training Purposes Only
FUEL FILTER
FUEL FILTER CLOGGING SWITCH LOCATION
FRA US/E Bu July 1999
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Fuel Indicating
A319 / A320 / A321
CFM 56-5A
73-30
WARNING MESSAGE
For Training Purposes Only
UPPER ECAM
DISPLAY
LOWER ECAM
DISPLAY
FUEL FILTER CLOGGING SWITCH
ENGINE 1
FUEL FILTER CLOGGING SWITCH
ENGINE 2
WARNING
Figure 62
FRA US/E Bu July 1999
Fuel Filter Clogging Indication
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Power Plant
Drains
A319 / A320 / A321
CFM 56-5A
71-70
ATA 71
POWER PLANT
71-70
DRAINS
PYLON AND ENGINE DRAINS
Engine Drains
Drain lines are provided on the engine to collect and carry overboard waste
fluids and vapors from engine systems and accessories.
This drain system consists of a drain collector with 4 manual drain valves for
trouble shooting, a drain module and a drain mast.
For Training Purposes Only
DRAIN MODULE
System Operation
The collector retains drain fluids until expelled in flight. The module assembly
discharges fluids directly overboard through the drain mast. The drain mast
which protrudes through the fan cowl door into the airstream is the channel
through which the fluids are discharged overboard except for the fuel shroud
drain which discharges fluid directly overboard through an independent drain
tube.
Each accessory seal (starter, IDG, hydraulic pump, fuel pump) has a separate
drain to the collector in which leakage is contained. Manual drain valves in the
bottom of each collector enables the determination of excess leakage.
Each collector is labeled with the accessory seal drain to which it isconnected.
These individual collectors overflow into the fuel/oil holding tank or a hydraulic
fluid/oil holding tank.
Leakage is contained in the holding tank until the aircraft reaches an airspeed
of 200 Knots.
When the airspeed reaches 200 Knots a pressure valve in
the module assembly admits ram air. The ram air pressurizes the holding tanks
and any accumulated fluid is discharged overboard through the drain mast.
discharged directly overboard, except for the fuel shroud pipe which has its
own drain tube.
- the oil tank scupper
- the forward sump
- the fan case
- the oil/fuel heat exchanger
- the VBV
TS82 KH / MA
5.4.93
- the VSV
- the TCC
- HMU
- the aft sump
- the fuel shroud pipe (individual drain tube)
Use of Drain System to Monitor Accessory Seals Leakage Rate.
Each drain collector has been sized to collect the maximum acceptable leakage from the accessory seal for a flight of 240 minutes duration, based on the
following leak rates:
- Starter (20cc/hour)
- Hydraulic pump (20cc/hour)
- IDG (20cc/hour)
- Fuel pump (30cc/hour)
The procedure for determining the leakage rate, without a specific engine
ground run is:
- Prior to flight departure, drain fluid from all four (4) accessory seal drain
collectors.
- After one flight, of about one hour, drain fluid from drain collectors into a
measured container.
- For fuel or oil leakage limits (Ref. 71-00-00 P. Block 500)
Page: Page: 126
Lufthansa Technical Training
Power Plant
Drains
A319 / A320 / A321
CFM 56-5A
71-70
WING
PYLON
PYLON
DRAINS
DRAIN COLLECTOR
DRAIN MAST
DRAIN MODULE
MANUAL
DRAIN VALVE
4 PLACES
FAN
AREA
IDG
HYD
PUMP
AFT
SUMP
TCC
VSV
SHROUD
PIPE
OIL/FUEL
HEAT
EXCHANGER
G
E
A
R
B
O
X
FAN
CASE
6 O CLOCK
FIRE
BULKHEAD
HMU
FUEL
OIL
DRAIN
COLLECTOR
ASSEMBLY
OIL
HYD
FIREPROOF
HOLDING
TANKS
COWL LINE
DRAIN
MODULE
DRAIN MAST
Figure 63
5.4.93
VBV
AND
VSV
FWD
SUMP
LUB
PUMP
TS82 KH / MA
CORE
AREA
DRAIN COLLECTOR
STARTER
FUEL
PUMP
For Training Purposes Only
OIL
SCUPPER
FRANGIBLE
Engine Drains
Page: Page: 127
Lufthansa Technical Training
Power Plant
Drains
A319 / A320 / A321
CFM 56-5A
71-70
Use of Drain System to Monitor Accessory Seals Leakage Rate.
Each drain collector has been sized to collect the maximum acceptable leakage from the accessory seal for a flight of 240 minutes duration, based on the
following leak rates:
- Starter (20cc/hour)
- Hydraulic pump (20cc/hour)
- IDG (20cc/hour)
- Fuel pump (30cc/hour)
The procedure for determining the leakage rate, without a specific engine
ground run is:
- Prior to flight departure, drain fluid from all four (4) accessory seal drain
collectors.
- After one flight, of about one hour, drain fluid from drain collectors into a
measured container.
For Training Purposes Only
Use of Drain System to Isolate an Abnormal High Leakage Rate.
If an abnormally high leakage rate from one seal pad is experienced, it can
cause a backflow and fill other drain collectors and holding tanks. When this
happens the following procedure is recommended to isolate which accessoryseal has the abnormally high leakage.
Drain fluid from all four (4) accessory seal drain collectors.
Perform a short duration engine ”idle” run, five (5) minutes or less, and
shut down the engine.
Check each of the four accessory seal drain collectors by draining the fluid
into a measured container. The pad seal with an abnormally high leakage
rate will be evident.
NOTE :
If more than one collector is full after step 3, restart the procedure
with a two minute or less engine ”idle” run.
TS82 KH / MA
5.4.93
Page: Page: 128
Lufthansa Technical Training
Power Plant
Drains
A319 / A320 / A321
CFM 56-5A
71-70
Vacbi File: ENGINE DRAIN LRU‘S
6:00 POSITION
TO DRAIN
MAST
PRESSURIZING
AIR FROM
DRAIN MODULE
- 4 manual
drain valves.
CYLINDERS
For Training Purposes Only
Starter
Collector
Fuel Pump
Collector
Figure 64
TS82 KH / MA
5.4.93
Hydraulic Pump
Collector
MANUAL DRAIN VALVES
IDG Collector
Drain Module
Page: Page: 129
A319 / A320 / A321
CFM 56-5A
71-70
For Training Purposes Only
Lufthansa Technical Training
Power Plant
Drains
Figure 65
TS82 KH / MA
5.4.93
Leakage Limits
Page: Page: 130
A319 / A320 / A321
CFM 56-5A
71-70
For Training Purposes Only
Lufthansa Technical Training
Power Plant
Drains
Figure 66
TS82 KH / MA
5.4.93
Leackage Limits
Page: Page: 131
A319 / A320 / A321
CFM 56-5A
71-70
PYLON DRAINS
The engine pylon is divided into 7 compartments.Various systems are routed
through these areas.
Any leckage from fluid lines is drained overboard through seperate lines in the
rear of the pylon.
For Training Purposes Only
Lufthansa Technical Training
Power Plant
Drains
TS82 KH / MA
5.4.93
Page: Page: 132
Lufthansa Technical Training
Power Plant
Drains
A319 / A320 / A321
CFM 56-5A
71-70
For Training Purposes Only
PYLON
DRAINS
Figure 67
TS82 KH / MA
5.4.93
Pylon Drains
Page: Page: 133
Lufthansa Technical Training
Engine Controls
General
ATA 76
A319 / A320 / A321
CFM 56-5A
76-00
ENGINE CONTROLS
THROTTLE CONTROL SYSTEM
General
The throttle control system consist of :
- the throttle control lever
- the throttle control artificial feel unit (Mecanical Box)
- the thrust control unit
- the electrical harness.
The design of the throttle control is based upon a fixed throttle concept :
this means that the throttle control levers are not servo motorized.
DETENT = (REVERSE) IDLE THRUST-REV
DETENT = MAX.CLIMB- CL
DETENT = MAX. CONTINOUS-MCT/FLX T/O
Reverse Thrust Latching Lever
To obtain reverse thrust settings, the revers thrust laching lever must be lifted
Thrust Control Unit
The Thrust Control Unit contains two resolvers, each of which sends the thrust
lever position to the Engine Control Unit.The extraction current for the resolvers
is provided by the ECU.
Autothrust Disconnect pushbutton.
The autothrust instinctive disconnect pushbutton can be used to disengage the
autothrust function.
For Training Purposes Only
THRUST LEVERS
General
The thrust levers comprises :
- a thrust lever which incorporates stop devices and autothrust
instinctive disconnect pushbutton switch
- a graduated fixed sector
- a reverse latching lever.
The thrust lever is linked to a mechanical rod. This rod drives the input lever of
the throttle control artificial feel unit (Mechanical Box).
The thrust lever has 3 stops at the pedestal and 3 detents in the artificial feel
unit:
0° STOP = FWD IDLE THRUST-IDLE
-20° STOP = FULL REVERSE THRUST-MREV
45° STOP = MAX .TAKE OFF THRUST-TOGA
FRAUS/E Bu
July 1999
Page: Page: 134
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
ENGINE THRUST LEVER CONTROL
AUTOTHRUST
DISCONNECT PB
REVERSE THRUST
LATCHING LEVER
THRUST LEVER
REVERSE THRUST
LATCHING LEVER
MECHANICAL
BOX
For Training Purposes Only
THRUST CONTROL
UNIT
HMU
- FUEL
METERING
VALVE
CHANNEL A
ECU
CHANNEL B
Figure 68
FRAUS/E Bu
July 1999
RESOLVER 1
RESOLVER 2
Engine Thrust Lever Control
Page: Page: 135
A319 / A320 / A321
CFM 56-5A
76-00
BUMP RATING PUSH BUTTON
This Push Buttons are optional equipment.
In some cases the throttle control levers are provided with ”BUMP” rating push
buttons,one per engine.This enables the ECU to be re-rated to provide additional thrust capability for use during specific aircraft operations.
For Training Purposes Only
Lufthansa Technical Training
Engine Controls
General
FRAUS/E Bu
July 1999
Page: Page: 136
A319 / A320 / A321
CFM 56-5A
76-00
For Training Purposes Only
Lufthansa Technical Training
Engine Controls
General
Figure 69
FRAUS/E Bu
July 1999
Bump Push Bottons
Page: Page: 137
A319 / A320 / A321
CFM 56-5A
76-00
ARTIFICIAL FEEL UNIT(MECANICAL BOX)
The Throttle control artificial feel unit is located below the cockpit center pedestal. this artificial feel unit is connected to engine 1(2) throttle control lever and to
the engine 1(2) throttle control unit by means of rods.
The artificial feel unit is a friction system wich provides a load feedback to the
throttle control lever.
This artificial feel unit comprises two symetrical casings, one left and one right.
Each casing contains an identical and independent mechanism.
Each mechanism is composed of:
- a friction brake assembly
- a gear assembly
- a lever assembly
- a bellcrank assembly
Throttle lever travel is transmitted to the to the artificial feel unit and to the
throttle control unit.
The linear movement of the throttle levers is transformed into a rotary movement at the bellcranck which turns about the friction brake assembly shaft. This
movement rotates a toothed quadrant integral with the shaft.
This toothed quadrant causes inverse rotation of a gear equipped with a
disk which has three detent notches. Each notch corresponds to a throttle
lever setting and is felt as a friction point at the throttle levers.
For Training Purposes Only
Lufthansa Technical Training
Engine Controls
General
FRAUS/E Bu
July 1999
Page: Page: 138
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
MECHANICAL BOX(ES)
An adjustment screw
is provided at the
lower part of each
mechanical box to
adjust the artificial feel.
MECHANICAL
BOXES
RIGGING
POINT
For Training Purposes Only
ADJUSTMENT
SCREW
DETENT FORCE
ADJUSTMENT
Figure 70
FRAUS/E Bu
July 1999
Mechanical Boxes
Page: Page: 139
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
THROTTLE CONTROL UNIT
The throttle control unit comprises :
an input lever
mechanical stops which limit the angular range
2 resolvers whose signals are dedicated to the ECU (one resolver per
channel of the ECU)
6 potentiometers fitted three by three. Their signals are used by the flight
control system and the thrust reverser control system
a device which drives the resolver and the potentiometer
a pin device for rigging the resolvers and potentiometers
a safety device which leads the resolvers outside the normal operating
range in case of failure of the driving device
two output electrical connectors.
The input lever drives two gear sectors assembled face to face. Each sector
drives itself a set of one resolver and three potentiometers.
For Training Purposes Only
Relation between TRA and TLA:
The relationship between the throttle lever angle (TLA) and throttle resolver
angle (TRA) is linear and : 1 deg. TLA = 1.9 TRA.
The accuracy of the throttle control unit (error between the input lever position
and the resolver angle) is 0.5 deg. TRA.
The maximum discrepancy between the signals generated by the two resolvers
is 0.25 deg. TRA.
The TLA resolver operates in two quadrants :
the first quadrant serves for positive angles and the fourth quadrant for negative angles.
Each resolver is dedicated to one channel of the ECU and receives its electrical excitation from the ECU.
The ECU considers a throttle resolver angle value :
- less than -47.5 deg. TRA or
- greater than 98.8 deg. TRA as resolver position signal failure.
The ECU incorporates a resolver fault accomodation logic. This logic allows
engine operation after a failure or a complete loss of the throttle resolver position signal.
FRAUS/E Bu
July 1999
Page: Page: 140
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
3 COUPLED POTENTIOMETERS
ELECTRICAL
CONNECTORS
C
C
For Training Purposes Only
RESOLVER
C
RIGGING
POINT
THRUST CONTROL UNIT(S)
2 RESOLVERS
- 2 units
Each unit consists of :
- 2 resolvers
- 6 potentiometers.
Figure 71
FRAUS/E Bu
July 1999
Thrust Control Units
Page: Page: 141
A319 / A320 / A321
CFM 56-5A
76-00
RIGGING
The throttle control levers must be at the idle stop position to perform the rigging procedure.
For Training Purposes Only
Lufthansa Technical Training
Engine Controls
General
FRAUS/E Bu
July 1999
Page: Page: 142
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
A
Mechanical
Box
For Training Purposes Only
Riggpin
Thrust
Control
Unit
Riggpin
Figure 72
FRAUS/E Bu
July 1999
Thrust Control System Rigging
Page: Page: 143
A319 / A320 / A321
CFM 56-5A
76-00
AIDS ALPHA CALL UP OF TLA
Using the AIDS- Alpha call up it is possible to check both TLA (Thrust Lever
Angle)
For Training Purposes Only
Lufthansa Technical Training
Engine Controls
General
FRAUS/E Bu
July 1999
Page: Page: 144
Lufthansa Technical Training
Engine Controls
General
A319 / A320 / A321
CFM 56-5A
76-00
AIDS PARAM ALPHA CALL-UP
ENTER ALPHA CODE
- TLA
- TLA
ECU 1 :
ECU 2 :
- (
)
- (
)
- (
)
- (
)
0.0
0.1
PRINT>
For Training Purposes Only
<RETURN
Figure 73
FRAUS/E Bu
July 1999
Alpha Call-up TLA
Page: Page: 145
Lufthansa Technical Training
Engine Indicating
General
ATA 77
77-00
A319 / A320 / A321
CFM 56-5A
77-00
ENGINE INDICATING
ENGINE INDICATING GENERAL
ECAM UPPER DISPLAY
The engine primary parameters are permanently displayed on the ECAM upper
display.
The trust limit is shown in % on the left side for:
TO/GO = Take Off / Go Around Power
CL = Climb Power
MCT = Max Continius Power
Flex = Flex Take Off ( The Temperature is shown behind the limit) Flex can
be initiated via the MCDU REF. page. A temperature above 30 deg. C will
reduce the Power.
M/REV = Max Reverse Power
ECAM LOWER DISPLAY
For Training Purposes Only
The secondary parameters are displayed on the ECAM lower display (ENGINE
Page) when automatically or manually selected.
Engine Warnings
LOW N1
OVERLIMIT EGT.N1 .N2.
THRUST LEVER DISAGREE
THRUST LEVER FAULT
OIL LOW PRESSURE
OIL HIGH TEMPERATURE
OIL FILTER CLOG
FUEL FILTER CLOG.
FRA US/E Bu July 1999
Page: Page: 146
Lufthansa Technical Training
Engine Indicating
General
A319 / A320 / A321
CFM 56-5A
77-00
10
5
UPPER ENG.
ECAM DISPLAY
UNIT
70.4
5
10
670
99.8
For Training Purposes Only
LOWER ENG.
ECAM DISPLAY
UNIT
0950
90
nac
c
90
70.4
EGT
c
N2
%
F.F
10
670
99.9
OR
FLX 84.6%35°C
FOB: 3600 KG
S FLAP F
0980
2
ENGINE
F.USED
VIB
Kg
1300
1250
0.8
OIL
VIB
20 qt
20
1.2
.5
.4
11
11
0
0
100
0 42 psi 0 44
c
20
20
IGN
A B
34 PSI
PSI 35
Figure 74
FRA US/E Bu July 1999
10
5
5
Kg/h
100
NAC temp. indication:
N1
%
CL
88,1%
MCT
94,3%
T/O
95.4%
M/REV
70,0%
N1
0.9
N2
1.3
OIL FILTER
CLOG
CLOG
F. FILTER
CLOG
CLOG
Engine ECAM Displays
Page: Page: 147
Lufthansa Technical Training
For Training Purposes Only
Engine Indicating
General
77-10
A319 / A320 / A321
CFM 56-5A
77-00
POWER INDICATION
N1 SPEED SENSOR
N1 INDICATION SYSTEM
N1 Speed Sensor
The N1 speed sensor :
- detects the low pressure assembly rotational speed
- transmits the corresponding signals to the Engine Vibration Monitoring Unit
and the Electronic Control Unit, Channel A & Channel B.
General
The N1 speed sensor is installed on the fan frame strut at the 5:00 o’clock position. It is secured to the fan frame with 2 bolts.
This sensor is an induction type tachometer. It consists of 3 independent sensing elements which are magnetically and electrically insulated from one
another. A sensor ring mounted on the fan shaft is provided with 30 teeth.
The passage of each tooth in front of the magnetic head modifies the lines of
magnetic force of the magnets. This creates a flux variation in the coils.
The flux variation generates an alternating electromotive force proportional to
the rotational speed of the LP rotor assembly.
NOTE : The sensor ring has one tooth thicker than the 29 others.This tooth
generates a signal of greater amplitude used as phase reference for trim balance (processed in the EVMU).
When the N1 speed sensor is installed on the engine you can only see
these components :
- the three-connector receptacle
- the connector head
- the sensor securing flange.
The N1 speed sensor consists of the following :
- a three-connector receptacle (ch. A - airframe - ch. B).
- a flange for attachment of the sensor to the engine
- a rigid metal tube including two bonded damping rings, a magnetic
head (sensor probe) which includes 3 windings, 3 permanent magnets
and the pole pieces and three pairs of shielded lead wire providing
the electrical signals from the sensing elements to the connectors.
The N1 indication is displayed on the upper display unit of the ECAM system :
- in the analog form, by a pointer deflecting in front of a dial,
- in the digital form, in the lower section of the dial.
FRA US/E Bu July 1999
ECU
ECU
EVMU
Page: Page: 148
Lufthansa Technical Training
Engine Indicating
General
A319 / A320 / A321
CFM 56-5A
77-00
A
ACTUAL N1: N1 NEEDLE AND N1 DIGITAL INDICATION ARE NORMALLY GREEN.
THE NEEDLE PULSES AMBER WHEN THE ACTUAL N1 IS ABOVE THE N1 MAX. BOTH
NEEDLE AND DIGITAL INDICATION PULSE RED WHEN THE ACTUAL N1 IS ABOVE THE
N1 RED LINE(102%). WHEN N1 IS DEGRADED (BOTH N1 SENSORS FAILED),THE
LAST DIGIT OF THE DIGITAL DISPLAY IS AMBER DASHED.
B
N1 COMMAND: N1 CORRESPONDING TO THE ATS DEMAND, LIMITED BY THE THRUST
LEVER POSITION. NOT DISPLAYED IF A/THR OFF.
C
D
E
TRANSIENT N1(BLUE ARC): SYMBOLIZES THE DIFFERENCE BETWEEN THE N1 COMMAND
AND THE ACTUAL N1. NOT DISPLAYED IF A/THR OFF.
N1 TLA: N1 CORRESPONDING TO THE THRUST LEVER POSITION (PREDICTED N1).
MAX N1: AMBER INDEX AT THE VALUE CORRESPONDING TO THE FULL FORWARD
POSITION OF THE THRUST LEVER.
N1 EXCEEDANCE: IF 100.3% IS EXCEEDED, A RED MARK APPEARS AT THE MAX
VALUE ACHIEVED. IT WILL DISAPPEAR AFTER A NEW START ON GROUND OR AFTER
MAINTENANCE ACTION THROUGH THE MCDU.
REVERSE: APPEARS AMBER WHEN ONE REVERSER IS UNLOCKED. IT CHANGES TO
GREEN WHEN THE DOORS ARE FULLY DEPLOYED. IF UNLOCKED IN FLIGHT,THE
INDICATION FLASHES FOR 9 SECONDS AND THEN REMAINS STEADY.
F
B
C
5
%
A
REV
35.5
D
E
F
G
For Training Purposes Only
G
LP rotor speed (N1)
Figure 75
FRA US/E Bu July 1999
N1 Indication
Page: Page: 149
Lufthansa Technical Training
For Training Purposes Only
Engine Indicating
General
A319 / A320 / A321
CFM 56-5A
77-00
N2 INDICATION SYSTEM
N2 Speed Sensor
The N2 speed sensor detects the rotational speed of the HP rotor assembly. It
transmits the signal to the following equipment :
- Engine Vibration Monitoring Unit (EVMU)
- ECU (channel A)
- ECU (channel B)
This sensor is an induction tachometer type. It comprises 3 sensitive elements.
Each element is magnetically and electrically isolated from the other.
Each sensitive element includes a magnet, a coil and a polar mass.
These sensitive elements are hermetically sealed in a stainless steel
housing.
A magnetic wheel, part of the AGB drive system, is provided with 71 teeth on
its web. The passage of each tooth in front of the magnetic head modifies the
lines of magnetic force of the magnets. This creates a flux variation in the coils.
The flux variation generates an alternating electromotive force proportional to
the rotational speed of the HP rotor assembly.
The N2 speed sensor is installed at 6:30 o’clock on the accessory gearbox
(AGB) rear face with 2 bolts.
When the sensor is installed, only the 3 fixed connectors and sensor body are
visible.
The N2 speed sensor consists of the following :
A body including :
- three fixed connectors
- a flange for attachment to the AGB.
- a groove which accommodates a seal for tightness between sensor and
AGB.
The N2 indication is displayed on the upper display unit of the ECAM system.
The N2 indication is provided in the digital form.
AGB GEAR
N2 SPEED SENSOR
O-RING
AGB CASE
N2 SPEED SENSOR
FRA US/E Bu July 1999
Page: Page: 150
Lufthansa Technical Training
Engine Indicating
General
A319 / A320 / A321
CFM 56-5A
77-00
THE HP ROTOR SPEED DIGITAL INDICATION IS NORMALLY
GREEN. DURING THE START SEQUENCE THE INDICATION IS GREEN ON
A GREY BACKGROUND.
WHEN N2 EXCEEDS 105.8 % A RED CROSS APPEARS NEXT TO THE
DIGITAL INDICATION. IT WILL DISAPPEAR AFTER A NEW TAKE OFF OR
AFTER MAINTENANCE ACTION.
WHEN THE N2 VALUE IS DEGRADED (IN CASE OF BOTH N2 SENSORS
FAILURE) THE LAST DIGIT IS AMBER DASHED.
HP rotor speed (N2)
99.9
For Training Purposes Only
99.8
N2
%
Figure 76
FRA US/E Bu July 1999
N2 Indication
Page: Page: 151
Lufthansa Technical Training
Engine Indicating
General
77-20
A319 / A320 / A321
CFM 56-5A
77-00
TEMPERATURE
EGT INDICATION
The engine Exhaust Gas Temperature (EGT) is sensed and averaged by 9
thermocouple probes (chromel/alumel) located in the T495 plane of Low Pressure Turbine (LPT) stage 2 nozzle assembly.
The T49,5 thermocouple wiring harness consists of:
- Three identical and interchangeable thermocouple lead assemblies with two
probes.
- One thermocouple lead assembly with three probes.
- One upper extension lead.
- One lower extension lead.
- One main junction box assembly.
For Training Purposes Only
The electromotive force is averaged first in each of the individual lead assembly (2 probes and 3 probes), then in the main junction box assembly at the level
of the interface connector.The resultant averaged electromotive force is then
sent to the ECU through the HCJ13 harness and the HJ13 harness.
The EGT indication appears on the upper display unit of the ECAM system.
The ECAM provides the EGT indication :
- in analog form thru a pointer which deflects in front of a dial,
- in digital form, in the lower section of the dial.
THERMOCOUPLE HARNESS
FRA US/E Bu July 1999
Page: Page: 152
Lufthansa Technical Training
Engine Indicating
General
A319 / A320 / A321
CFM 56-5A
77-00
ACTUAL EGT: NORMALLY GREEN.
POINTER PULSES AMBER AND NUMERIC VALUE IS
GREEN WHEN EGT IS HIGHER THAN 855.C, OR 725.C
DURING THE ENGINE START SEQUENCE.
BOTH PULSE RED WHEN EGT EXCEEDS 890.C.
MAX EGT (AMBER INDEX): 725.C AT ENGINE START
THEN 855°C (MCT).
EGT EXCEEDANCE(RED INDEX): IF 890C IS EXCEEDED, A RED
MARK APPEARS AT THE MAX VALUE ACHIEVED. IT WILL
DISAPPEAR AFTER A NEW TAKE OFF OR AFTER MAINTENANCE
ACTION THROUGH THE MCDU.
POINTER
EGT LIMIT
RED LINE
LIMIT EXCEEDANCE
For Training Purposes Only
RH
Thermocouples
MAIN
JUNCTION
BOX
LH
Thermocouples
Figure 77
FRA US/E Bu July 1999
EGT Indication
Page: Page: 153
A319 / A320 / A321
CFM 56-5A
77-00
For Training Purposes Only
Lufthansa Technical Training
Engine Indicating
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Figure 78
FRA US/E Bu July 1999
ECAM warning Messages
Page: Page: 154
Lufthansa Technical Training
For Training Purposes Only
FRA US/E Bu July 1999
Engine Indicating
General
Figure 79
ECAM Warning Messages
Page: Page: 155
77-00
CFM 56-5A
A319 / A320 / A321
Lufthansa Technical Training
For Training Purposes Only
INDICATING
MAX POINTER RESET
ATA31
31-00
INDICATING
MAX POINTER RESET ( N1, N2 & EGT )
Monitoring of the relevant display of the engine parameters
N1 , N2, EGT, and FF indications of both engines are monitored internally and
externally .The DMC compares the N1 signal received from the EEC 1 with the
feedback signal which reflects the displayed position of the N1 needle In order to grant dissimilarity with the engine 2 monitoring process the DMC
compares the N1 signal from the EEC 2 with the feedback signal representing
the N1 digital value.
The same applies to the EGT parameters indications, but with the displayed
position of the engine 2 EGT needle and the engine 1 EGT digital feedback
value.
As for the N2 and FF parameters, the DMC compares the direct signal from the
EEC with the displayed digital value.
In case of detected discrepancy, a CHECK amber message is displayed just
below the relevant parameter indication .
In addition the FWC,s perform an external monitoring between the feedback
signals (that correspond to the displayed values and the signets that are directly received by the FWC’s from the EEC‘s
Should a descrepancy occur, for one or more parameters, a CHECK amber
message is displayed under the relevant indication
The FWC’s generate a caution
- single chime
- master caution Light
- message on the upper ECAM DU : ENG 1 (2) N1(N2/EGT/FF) DISCREPANCY
Max pointer Reset ( N1, N2 & EGT )
The Max pointers for N1, N2 and EGT can be reset using the CFDS menu
INSTRUMENTS. The menu for the EIS 1,2,3,( DMC 1,2,3 ) must be selectet.
The memory cells which store the possible exceedance are reset either by
pressing the GENERAL RESET line key or automatically at the next take off.
FRA US/T kh
A321-130
IAE-V2530-A5
03.98
Read-out/Reset of the Engine Red Line Exceedances
The DMC connected to the upper ECAM DU monitors primary parameter
indications of both engines.
Should an exceedance occur, the DMC memorizes in its BITE memory the
maximum value reached during the Last Flight Leg
The values of the N1, N2, EGT red lines and transitory overlimit values are
stored in 2 independent tables, one per engine.
Read out of this engine parameter exceedance can be performed via the DMC
MCDU menu.With the function engines the parameters can be selected either
for engine 1 or 2.
Note:
A reset of the red line limits have to be performed on all 3 DMCS.
N1 RED LINE Exceedance
The N1 red line is represented by an arc shaped red ribbon situated at the end
of the scale.
If the N1 actual value exceeds the N1 red line (even for a short period of time),
a small red line appears across the N1 scale and then stays at the maximum
value which has been reached.
This indicates a N1 exceedance condition.Should this condition occur, the
small red line disappears only after a new take-off or after a maintenance action through the MCDU DMC reset.
N2 RED LINE Exceedance
The N2 indications are displayed in digital form only. 100% N2 correspond to
14460 RPM.Should N2 actual exceeds the N2 red line value,a red cross appears next to the digital indication. This red cross disappears only after a new
take off or a DMC reset.
EGT RED LINE Exceedance
The EGT indications are provided in the same form as for the N1
indications.The same applies to changes in color and EGT exceeding
indications.However it has to be noticed that the amber linie (EGT MAX) is variable.725 deg. C at engine start and 855 deg. C afterwards.Red line Limit is 890
deg.C.
Page: 156
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INDICATING
MAX POINTER RESET
A321-130
IAE-V2530-A5
31-00
For Training Purposes Only
REFER TO ADDITIONAL PAGES !
Figure 80
FRA US/T kh
03.98
Max Pointer Reset
Page: 157
Lufthansa Technical Training
For Training Purposes Only
Engine Indicating
Analyzers
77-30
A319 / A320 / A321
CFM 56-5A
77-30
ANALYZERS
VIBRATION
General
The engine vibration measurement system comprises :
- two transducers (piezoelectric accelerometers)
- an Engine Vibration Monitoring Unit
- two vibration indications N1 and N2.
The engine vibration system provides the following functions :
- vibration indication due to rotor unbalance via N1 and N2 slaved tracking fil
ters
- excess vibration (above advisory levels)
- fan balancing (phase and displacement)
- shaft speed (N1 and N2)
- storage of balancing data
- initial values acquisition on request
- BITE and MCDU communication
- accelerometer selection
- frequency analysis when the printer is available (option).
Accelerometers
Two accelerometers installed on each engine permit N1 and N2 vibrations to
be measured.
The first is fitted on the number 1 bearing, the second on the turbine rear
frame.
- Number 1 bearing accelerometer, normal pick-up, provides N1 and N2
vibration frequencies.
- The turbine rear frame ( TRF ) accelerometer is in standby and also
used with the first to analyse results for engine balancing.
No. 1 Bearing Vibration Sensor
The No. 1 bearing vibration sensor (piezo-electric type) permanently monitors
the vibrations from No. 1 bearing. It also senses vibrations from LPT and HPT
shafts,though it is less sensitive to LPT and HPT shaft vibrations. It is also
used for trim balance operations.
The accelometer part of the vibration sensor is located at the 9:00 o’clock position on No. 1 and No. 2 bearing support (near No. 1 bearing).
FRA US-E Bu July99
The sensor cable is routed through the fan frame. It comes out at the 3:00
o’clock position on fan frame mid-box structure aft face.
NOTE:
The No 1 bearing accelerometer is not a LRU.It can not be changed on
line maintenance.It can only be changed when the fan module is removed in the shop.
Turbine Rear Frame Vibration Sensor
The Turbine Rear Frame (TRF) vibration sensor ( piezo-electric type) used in
conjunction with the No. 1 bearing vibration sensor to monitor and, if necessary, reduce the engine vibration level using the trim balance procedure.
The vibration signal is used by the aircraft Engine Vibration Monitoring Unit
(EVMU).
The TRF vibration sensor is installed at 12 o’clock (ALF) on the front flange of
the turbine rear frame.It consiste in a hermetically sealed housing that encloses
the sensing element. A flange with two holes is used to attach the housing to
the engine. One electrical connector at the end of semi-rigid cable provides the
interface with an aircraft harness.
Engine Vibration Monitoring Unit (EVMU)
The Engine Vibration Monitoring Unit (EVMU) is located in the avionics
compartment shelf 86VU.
The EVMU has 2 channel modules.Each channel module processes the signals from the two engine accelerometers and from the two speed signals N1
and N2 : this enables extraction from the overall vibration signal, of a component due to rotor first order unbalance.Only one accelerometer is used at any
particular time. The second accelerometer is selected manually via MCDU
ACC. Reconfiguration MENU or automatically at the next power up due to a
failure of the N1 BEARING ACCEL.The N1 and N2 signals are used :
- to drive the tracking filters, and
- slave their center frequencies at the shaft rotational speed.
The accelerometer signals pass through these tracking filters which extract the
N1 and N2 related fundamental vibration. The acceleration signal is then integrated in order to express the vibration in velocity terms.
Page: Page: 158
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Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
ACCELEROMETER
CONNECTION
PLUG
TRF Vibration Sensor
( ACC 2 )
CONNECTION
For Training Purposes Only
EVMU
86VU
EVMU
BEAR 1 Sensor
EVMU Location
ACCELEROMETER
Figure 81
FRA US-E Bu July99
- this unit cannot be changed
on line maintenance but
only when the fan module
assembly is removed.
Vibration Sensors
Page: Page: 159
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For Training Purposes Only
Engine Indicating
Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
ENGINE VIBRATION MONITORING UNIT ( EVMU )
VIBRATION INDICATION
An engine vibration monitoring unit monitors the N1 and N2 levels of both
engines.
The EVMU receives analog signals from :
- the 4 engine accelerometers (2 per engine)
- and the N1 and N2 speed sensors of each engine.
It also receives digital input from CFDS through ARINC 429 data bus.
The EVMU sends signals through the digital ARINC 429 data bus to :
- SDAC1 and 2 for cockpit indication
- the CFDIU
- the DMU
- and printer (if installed) for maintenance purposes.
BITE maintenance and fault information
The EVMU contains a BITE to detect internal and external failure.
During the execution of the cyclic BITE sequence, the following parts of the
EVMU are checked :
- the non-volatile memory
- the timers
- the analog-to-digital converter
- the ARINC 429 transmitter and receivers
- the real tacho generators.
During the power-up sequence of the BITE, the following parts of the EVMU
system are checked :
- N1 and N2 NB velocity
- unbalance data
- N1 and N2 tacho frequencies
- accelerometer signals.
Any detected failure is stored in the non-volatile memory with GMT,date and
other reference parameters.
The N1 and N2 vibrations of the left and right engines are displayed on the engine and cruise pages.
Displayed values are up to 10 units range.
Note:
1 unit = 0,3 inch/sec
1 MIL = 1/1000 inch
Interfaces
The EVMU interfaces with the ECAM and the CFDS
CFDS interfaces: Maintenance fault messages.
FRA US-E Bu July99
Page: Page: 160
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Engine Indicating
Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
VIBRATION indications:
THE VIBRATION INDICATIONS
OF THE LP AND HP ROTORS ARE
DISPLAYED IN GREEN.
PULSING
ADVISORY
ABOVE 6
PULSING
ADVISORY
ABOVE 4.3
VIB
0.8
VIB
1.2
0.8 0.8
N1
0.9
N2
1.3
1.2 1.2
80
Amber XX in case of loss of signal
95
80
95
For Training Purposes Only
NO.1 BRG
VIBRATION SENSOR
SDAC1
AFT ( TRF )
VIBRATION SENSOR
SDAC2
CFDIU
Figure 82
FRA US-E Bu July99
Vibration Indication
Page: Page: 161
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Engine Indicating
Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
CFDS INTERFACE
The Centralized Fault Data System (CFDS) enables access to the systems.
The CFDS gives, maintenance information and initiates tests through the system BITE.
When the maintenance personnel needs information on the condition of the
EVMU, the CFDS operates in menu mode. The first menu sent to the MCDU is
the main menu. The various functions are detailed here after.
Test
The test item allows initiation of a complete check of the EVM system.
If no failure has been detected, the message ”TEST OK” is displayed.
If any failure has been detected the failed LRU is displayed.
Checked LRUs are the ones listed in ”Ground failures” item.
Last leg report
The EVMU sends the list of the LRUs which have been detected faulty during
the last leg. During the flight the following faults can be detected :
- EVMU
- N1 SPEED SENSOR, L
- N1 SPEED SENSOR, R
- N2 SPEED SENSOR, L
- N2 SPEED SENSOR, R
Previous leg report
The EVMU sends the list of the LRUs which have been detected faulty during
the legs (maximum 62) previous to the last leg. The faults detected are the
same as for the last leg report.
LRU identification
For Training Purposes Only
The EVMU sends the EVM unit part number and manufacturer
Ground failures
The EVMU sends the list of the LRUs which have been detected faulty during a
ground test. Only the three last detected failures are displayed. The following
LRUs are tested :
- EVMU
- N1 BEAR VIB SENSOR, L
- N1 BEAR VIB SENSOR, R
- TRF VIB SENSOR, L
- TRF VIB SENSOR, R
FRA US-E Bu July99
Page: Page: 162
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Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
For Training Purposes Only
refer to Additional Pages !
Figure 83
FRA US-E Bu July99
MCDU EVMU Menue
Page: Page: 163
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Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
CFDS INTERFACE
EVMU - Initial Values MENU
Initial value storage
The initial value is the actual value when the engine is new or rebalanced. At
each engine serial number corresponds an initial value.
The initial value is stored in the equipment :
- either automatically after request to the MCDU
- or point by point from the FCDU keyboard.
An initial value is defined every 5 % of RPM :
- from 20 % to 125 % for N1 vibration
- from 50 % to 125 % for N2 vibration.
When stored, the initial values are taken into account for advisory calculation
(Limit 2).
In that menu, ten sub-menus may be selected by the operator, which allows :
- command of the initial values acquisition during the next flight
- cancelling of the initial values acquisition demand
- reading of the initial values taken
- direct loading modification of the existing values.
Frequency analysis
This menu offers the possibility to request a frequency analysis of the acceleration signal to be performed on the ground.
The EVMU does the analysis at a selected N1 or N2 speed and uses any valid
accelerometer. The maximum frequency analysis is 500 Hz and the frequency
increment between adjacent spectral lines is 4 Hz.
Accelerometer reconfiguration
This menu allows selection of the accelerometer (Fan No. 1 bearing
or TRF) to be used for the next flights. The EVMU also indicates which accelerometer is in operation.
For Training Purposes Only
Engine unbalance
This menu allows selection, per engine, of five different engine speed, (from 50
% to 100 % N1 RPM) at which unbalance data will be stored. It also permits
reading of the unbalance data which were acquired during the previous command and to effectuate balancing for both engines with both accelerometers.
The EVMU measures the position and the amplitude of the rotor unbalance of
each engine. It provides these information to the output bus when available.
FRA US-E Bu July99
Page: Page: 164
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Analyzers
A319 / A320 / A321
CFM 56-5A
77-30
For Training Purposes Only
refer to Additional Pages !
Figure 84
FRA US-E Bu July99
MCDU EVMU Menue
Page: Page: 165
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Engine Fuel and Control
Controlling General
73-20
CFM 56-5A
73-20
CONTROLLING
Vacbi File: FADEC PRESENTATION
Vacbi File: FADEC PRINCIPLE
FADEC
Full Authority Digital Engine Control ( FADEC )
The FADEC consists of the Engine Control Unit ( ECU ), Hydromachanical Unit
( HMU ) and its peripheral components and sensors used for control and monitoring.
FADEC Definition
Each engine is equipped with a duplicated FADEC system. The FADEC acts as
a propulsion system data multiplexer making engine data available for condition
monitoring.
For Training Purposes Only
A319 / A320 / A321
FADEC Controls
The FADEC provides the engine sytem regulation and scheduling to control the
thrust and optimize the engine opration.
The FADEC provides:
- gas generator control
- flight deck indication data
- engine limit protection
- power management
- thrust reverse control
- feedback
- automatic engine starting
- Fuel return control for IDG cooling
The FADEC also provides two idle mode selections:
- Approach Idle: it is obtained when slats are extended in FLT.
- Minimum Idle: it can be modulated up to approach idle depending on:
Air conditioning demand
Engine anti ice demand
Wing anti ice demand
Temperature Engine Oil ( TEO for IDG cooling ).
Engine Limit Protection
The FADEC provides overspeed protection for N1 and N2, in order to prevent
engine exceeding certified limits, and also monitors the EGT.
Engine Systems Control
The FADEC provides optimal engine operation by controlling the:
- Fuel Flow
- Compressor air flow and turbine clearence.
Thrust Reverse
The FADEC supervises entirely the thrust reverse operation.
In case of a malfunction, the thrust reverser is stowed.
Start and Ignition Control
The FADEC controls the engine start sequence. It monitors N1, N2 and EGT
parameters and can abort or recycle an engine start.
Power Management
The FADEC provides automatic engine thrust control and thrust parameters
limits computation.
The FADEC manages power according to two thrust modes:
- manual mode depending on thrust lever angle ( TLA )
- Autothrust mode depending on autothrust function generated by the auto
flight system ( AFS ).
FRA US-E Bu July 1999
Page: Page: 166
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Controlling General
A319 / A320 / A321
CFM 56-5A
73-20
P 0 T4.9 T25
FMV
FEED
BACK
T12 PS12 PS3 T3
(EGT)
N1
T-CASE
N2
TEO
IGN B
IGN A
THRUST
LEVER
ÇÇ
ÇÇ
ANALOG &
DISCRETE
SIGNALS
28 V DC
115 V
400 HZ
A
B
Thrust Reverser
ECU ALTERNATOR
TRUST CONTROL
UNIT
CFM 56-5A
RESOLVER
IGNITORS
Ignition
Boxes
FUEL PRESS
FUEL FLOW
For Training Purposes Only
HMU
ECU
HYDRAULIC
PRESS
TO
BURNERS
FEEDBACK
( CH: A & B )
FEEDBACK
Return Fuel to AC Tank
HCU
FUEL RETURN
VALVE
FOR ENGINE TREND MONITORING
T/R REVERSER Stow / Deploy Feedback
FUEL
FLOW
P25
Ps13
T5
T/R REVERSER Stow / Deploy Command
Figure 85
FRA US-E Bu July 1999
FADEC System Schematic
Page: Page: 167
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Engine Fuel and Control
Controlling General
CFM 56-5A
73-20
FADEC LRU‘S
Vacbi File: FADEC ARCHITECTURE
Vacbi File: FADEC LRU‘S
ECU
The Engine Control Unit ( ECU ) is the computer of the FADEC system.
The ECU consists of two channels ( A and B ) with a crosstalk. Each channel
can control the different components of the engine systems.
The channels A and B are permanently operational. In case of failure on one
channel, the sytem switches automatically to the other. During engine start the
ECU is supplied with 28 VDC by the A/C network then by its own generator,
mounted on the accessory gearbox, when N2 reaches 15%.
For Training Purposes Only
A319 / A320 / A321
Additional Notes:
ECU Interfaces General
The electronic control unit (ECU) is a dual channel digital electronic control with
each channel utilizing a microprocessor for main control functions, an microcontroller for pressure transducer interface functions and a microcontroller for
ARINC communication function.
The ECU receives engine inlet condition data from the aircraft Air Data Computers (ADCs) and operational commands from the Engine Interface Unit (EIU)
in the aircraft on ARINC 429 data busses. It also receives operating condition
data from the various dedicated engine sensors such as T12, PS12,P0, N1,
N2, PS3, T25, T3 and TC, and computes the necessary fuel flow, VSV,VBV,
HPT clearance control, LPT clearance control, and rotor active clearance control valve positions.
The ECU provides the necessary current to the torque motors in the hydromechanical unit to control the various modulating valves and actuators.
The ECU performs an On/Off control of the Ignition Relays, Starter Air Valve
Solenoid, the Aircraft Thrust Reverser Directional Valve and the Thrust Reverser Pressurizing Valve.
The ECU provides digital data output in ARINC 429 format to the aircraft for
engine parameter display, aircraft flight management system and the aircraft
maintenance data system.
ECU hardware and software is designed so that the two channels operate normally with a set of internal inputs and outputs with access to cross
channel data inputs. Each channel can also operate independently withoutFRA US-E Bu July 1999
cross channel data.
Fault tolerance enables the engine to continue operation in the event any
or all of the airframe digital data is lost.
The ECU is powered by a three-phase engine alternator.
Aircraft power is required up to 15% N2 above which the alternator is able to
self-power the unit. Two independent coils from the alternator provide the
power to the two separate ECU channels.
The ECU is a vibration isolated single unit mounted on the fan case and is
forced air cooled.
Engine Condition Parameters Transmission
Engine condition monitoring will be possible, by the ability of the FADEC to
broadcoast the engine parameters through the ARINC 429 bus output.
The basic engine parameters available are :
- P0, PS12, PS3, T12, T25, T3, TC, TOIL, T49, N1, N2, WF
- VSV, VBV, HPTCC, RACCS, and LPTCC valve or actuator positions
- status and maintenance words, engine serial number and position.
In order to perform a better analysis of engine condition some additional
parameters are optionally available. These are P13, P25 and T5.
Page: Page: 168
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CFM 56-5A
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MASTER 2
A/C INTERFACES
ADIRS
P0
PS12
PS13
P25
PS3
FMGC
ON
EIU
FWC
ECU
CHANNEL A
T12
For Training Purposes Only
T2.5
T3
T5
T oil
T cc
gen
TLA
ENG
2
HYDROMECHANICAL
UNIT
-HP FUEL SOV
-FUEL METERING
-BURNER STAGING
VALVE
-VBV -VSV
-RACC
-HPTCC -LPTCC
T/REVERSER HCU
CROSS
TALK
-PRESSURIZING VLV.
- DIRECTIONAL VLV.
- PRESS DETECTOR
STARTER VALVE
CHANNEL B
IGNITION
BOX A - BOX B
EGT
N1
N2
FF
ECU COOLING
VALVE
FUEL RETURN
VALVE
Figure 86
FRA US-E Bu July 1999
OFF
FADEC LRU‘S Schematic
Page: Page: 169
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FADEC LRU‘S
Engine Interface Unit EIU ( 1/2 )
Each EIU, located in the avionics bay, is an interface concentrator between the
airframe and the corresponding FADEC located on the engine.
There is one EIU for each engine. It interfaces with the corresponding Engine
Control Unit ( ECU ).
ECU Generator ( Alternator )
The ECU generator located on the accessory gearbox front side provides ECU
power supply when N2 reaches 15%.
It generates 2 seperated 3 phase electrical power outputs to the ECU.
High temperture harness
wire strand:
- HCJ 11 L
- HCJ 11 R
- HCJ 12 L
- HCJ 12 R
- HCJ 13
For Training Purposes Only
Electrical Harnesses
Low temperature harness
wire strand:
- HJ 7
- HJ 12
- HJ 8
- HJ 13
- HJ 9
- HJ 10
- HJ 11
FRA US-E Bu July 1999
Page: Page: 170
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A319 / A320 / A321
CFM 56-5A
73-20
EIU
EIU2
ECU
86VU
EIU1
4:00 POSITION
PROGRAMMING
PLUG
PRESSURE
BOARD
ELECTRICAL
CONNECTIONS
ELECTRCAL HARNESSES
ECU GENERATOR
For Training Purposes Only
POLYAMIDE
INSULATION
PROTECTION
BRAID
SILICONE TUBING
ACCESSORY GEARBOX
FRONT FACE
CHANNEL A
CONNECTOR
CHANNEL B
CONNECTOR
SCREENED/SHEATHED
CABLE 2 CORES
Figure 87
FRA US-E Bu July 1999
STAINLESS STEEL
BRAID
HF SHIELDING
CONVOLUTED PTFE
CONDUIT
FADEC LRU‘S Components
Page: Page: 171
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Engine Sensors
73-20
A319 / A320 / A321
CFM 56-5A
73-20
ENGINE SENSORS
FADEC SENSORS
Sensor T12:
Electrical sensor, installed at 1:00 o‘clock on the fan case.
Sensor PS12:
3 Sensors which provides an average pressure.
Sensor PS 13:
Fan air discharge pressure sensor installed at 2:00 o‘clock on the fan case.
Sensor T 25:
Resistor probe type, installed at 5:30 o‘clock in the fan frame.
Sensor P 25:
Installed at 6:00 o‘clock in the fan frame.
- Entirely removable unit
- 3 connctors ( CHA-CHB-AC- EVMU )
- Installed at 5:00 o‘clock on the fan case.
Sensor N 2:
- N2 speed tachometer
- Installed at 6:30 o‘clock on the accessory gearbox rear side
- 3 Connectors ( CHA-CHB-AC- EVMU ).
Sensor T case:
- HPT Case Temperature
- Installed at 3:00 o‘clock and 9:00 o‘ clock on the HPT Case
- 2 Sensors (CH A, CH B )
Sensor T 3:
Thermocouple sensor installed at 11:00 o‘clock on the HP compressor case.
For Training Purposes Only
Sensor PS 3:
Pick-up of compressor discharge pressure installed at 9:30 o‘clock on the
HP compressor case.
Sensor T 49.5:
- 9 EGT thermocouples
- 4 parallel junction boxes
- 1 main junction box.
Sensor T 5:
- Thermocouple sensor
- Installed at 3:00 o‘clock on the turbine rear frame.
Sensor N 1:
- N1 speed tachometer
FRA US/E Bu July1999
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Engine Sensors
A319 / A320 / A321
CFM 56-5A
73-20
T3
PS13
T49.5
PS3
T12
T case
PS12
T25
P25
For Training Purposes Only
T5
N1
N2
Figure 88
FRA US/E Bu July1999
FADEC LRU‘S Sensors
Page: Page: 173
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T12 SENSOR
The T12 sensor is made to measure the engine intake air temperature.
It is installed on the air inlet cowl at the 1:00 o’clock position.
The T12 temperature sensor has 2 components: the sensing element and
the housing.
PS 12
PS13
For Training Purposes Only
P0 SENSOR
FRA US/E Bu July1999
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PS13
For Training Purposes Only
T12 Sensor
PS12
Figure 89
FRA US/E Bu July1999
T12 Sensor, PS12
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T25 SENSOR
The T25 sensor is located at 5:45 o’clock upstream of variable bleed (VBV) in
fan frame. The sensor measures the air temperature downstream of the
booster. This dual sensor is of the resistor probe type (platinum).
Operation
The operating principle of the sensor is based on the properties inherent to
metals (in this case platinum), being that their resistance varies in relation to
temperature.
A current generated by the ECU supplied to the probe resistor has its signal
modified by the temperature surrounding the probe.
For Training Purposes Only
P25
FRA US/E Bu July1999
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Engine Sensors
A319 / A320 / A321
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P25 Sensor
T25 Sensor
Figure 90
FRA US/E Bu July1999
T25, P25 Sensor (CIT)
Page: Page: 177
A319 / A320 / A321
CFM 56-5A
73-20
For Training Purposes Only
Lufthansa Technical Training
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Figure 91
FRA US/E Bu July1999
T3 Sensor
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CFM 56-5A
73-20
For Training Purposes Only
Lufthansa Technical Training
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Engine Sensors
Figure 92
FRA US/E Bu July1999
PS 3 Sensor (CDP)
Page: Page: 179
A319 / A320 / A321
CFM 56-5A
73-20
STUDENT NOTES:
For Training Purposes Only
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CFM 56-5A
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For Training Purposes Only
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Engine Sensors
Figure 93
FRA US/E Bu July1999
T5 Sensor
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Engine Control Unit
73-20
CFM 56-5A
73-20
ECU DESCRIPTION
ECU SOFTWARE MAIN FUNCTIONS
IDENTIFICATION CONNECTOR (J14)
Ground test of electrical and electronic parts is possible from cockpit with engines not running through the CFDS.
The FADEC provides engine control system self-testing to detect problem at
LRU level.
FADEC is such that no engine ground run for trim purposes is necessary after
component replacement.
The engine identification plug acts as an ”electronic nameplate” for the ECU.
It is connected to the J14 ECU fixed connector.
The mobile connector transmits the following electric coded signals to the
Electronic Control Unit (ECU):
Engine serial number
Engine family
Engine bump/overboost rating
Engine nominal rating
It is coded in the factory during installation of new engine, and is inseparable
from the engine.
ECU CONNECTIONS
Pressure Inputs
Five pneumatic pressure signals are supplied to pressure sub-systems A and B
of the ECU.These are converted into electric signals by pressure transducers
inside the ECU.
The 3 pressures used for engine control (P0,Ps12,P3) are supplied to both
channels.
The two optional monitoring pressures are supplied to a single channel (Ps13
to CH. A,P25 to CH.B)
The pressure sub-system shear plate serves as the interface between the
pneumatic lines and the ECU.The shear plate is bolted onto the ECU chassis.A
metal gasket with integral O-rings is installed between the plate and ECU.
Correct orientation of the assembly is assured by an alignment pin on the chassis and corresponding holes in the gasket and the shear plate.
For Training Purposes Only
A319 / A320 / A321
Electrical Connectors
Fifteen threaded electrical connectors are located on the lower panel of the
ECU.Each has a unique key pattern which acceps only the correct corresponding cable.
Connector identification numbers from J1 to J15 are marked on the panel.
All engine inputs and command outputs are double and routed to and from
channel A and B through seperate cables and connectors.
FRA US/E Bu July 1999
Channel A Channel B Function
ConnecConnectors
tors
J1
J2
Power Supply 28V, Ignition Power Supply 115VAC
J3
J4
Input / Output to / from Aircr., TLA Input
J5
J6
Connection to Thrust Reverser
J7
J8
HMU, N2 Sensor, FRV, ECU Cooling Valve
J9
J10
Control Alternator, SAV, T12, N1 Sensor,
J11
J12
Feed Back Sensors, BSV Pos. Switches, T25
J14
J14
Engine Identification Plug
J13
J13
T3, Tcase, Toil, T5, EGT, Fuel Flow
J15
J15
Test Interface
Page: Page: 182
A319 / A320 / A321
CFM 56-5A
73-20
For Training Purposes Only
Lufthansa Technical Training
Engine Fuel and Control
Engine Control Unit
Figure 94
FRA US/E Bu July 1999
ECU Pressure Connections
Page: Page: 183
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC Power Supply
A319 / A320 / A321
EE
73-20
CFM 56-5A
73-20
FADEC POWER SUPPLY
FADEC POWER SUPPLY
EIU Power supply
The EIU is powered from the aircraft electrical power, no switching has to be
done.
Engine Control Unit (ECU) Power Supply
The ECU is supplied from the aircraft electrical power when engine is shutdown, then from the ECU generator when the engine is running.
- aircraft electrical power when N2 <12%.
- ECU generator power when N2 >12%.
Powering N2 <12%
Each channel is independently supplied by the aircraft 28 volts through the Engine Interface Unit.
- after 5 mn of engine shutdown.
Note that an action on the ENG FIRE P/B provides ECU power cut off.
FADEC Ground Power Panel
For maintenance purposes and MCDU engine tests, the FADEC Ground Power
Panel permits FADEC power supply to be restored on ground with engine shut
down.
When the corresponding ENG FADEC GND POWER P/B is pressed ON the
ECU takes again its power supply.
Note that also the FADEC is repowered as soon as the engine MODE SELECTOR or the MASTER LEVER ( auto power shutoff after 5 min.) is selected.
For Training Purposes Only
A/C 28 VDC permits :
- automatic ground check of FADEC before engine running
- engine starting
- powering the ECU while engine reaches 12% N2.
Note that EIU takes power from the same bus bar as ECU.
Powering N2 >12%
As soon as engine is running above 12% N2, the ECU generator can supply
directly the ECU.
The ECU generator supplies each channel with three-phase AC. Two TRU’s in
the ECU provides 28VDC to each ECU channel.
Auto Depowering
The FADEC is automatically depowered on ground, through the EIU after engine shutdown.
ECU automatic depowering on ground :
- after 5 mn of A/C power up.
FRAUS/E Bu July 1999
Seite: Page: 184
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC Power Supply
A319 / A320 / A321
EE
CFM 56-5A
73-20
NOTE: * supplied for 5 min
ECU
401 PP (DC ESS BUS)
FOR ENGINE 1 & 2
DEDICATED
GEN
28V
A
28V
For Training Purposes Only
ECU
B
202 PP (DC BUS 2 )
FOR ENGINE 2
301 PP (BAT BUS)
FOR ENGINE 1
Figure 95
FRAUS/E Bu July 1999
FADEC Power Supply
Seite: Page: 185
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC Power Supply
EE
A319 / A320 / A321
CFM 56-5A
73-20
CONTROL ALTERNATOR
The control alternator is a high speed bearingless device that generates
3-phase electrical power for use by the engine control system.
The output is sufficient for engine needs above 12% N2.
The alternator is located on the left forward side of the accessory gearbox.
It consists of a separate interchangeable rotor and a separate interchangeable
stator. The rotor contains permanent magnets and is piloted on the accessory
shaft which has 3 equally spaced drive flats. The rotor is retained by a nut. The
stator has dual 3-phase windings and is bolted to the accessory pad. Sealing
is provided by an O-ring.
Control Alternator Characteristics
136 W
14 VAC (10 - 15% N2)
300 VAC (100 % N2)
For Training Purposes Only
Max. power output:
Min. voltage:
Max. voltage:
FRAUS/E Bu July 1999
Seite: Page: 186
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
FADEC Power Supply
A319 / A320 / A321
EE
CFM 56-5A
73-20
B
For Training Purposes Only
A
Figure 96
FRAUS/E Bu July 1999
Control Alternator
Seite: Page: 187
Lufthansa Technical Training
For Training Purposes Only
Engine Fuel and Controls
FADEC Power Management
73-20
A319 / A320 / A321
CFM 56-5A
73-20
POWER MANAGEMENT
GENERAL
Thrust Limit mode selection
Throttle lever is used as a rating mode selection device. By receiving the
throttle lever position signal, the FADEC computes permanently thrust limit ratings, shall select the corresponding limit value and send it to the cockpit.When
the throttle lever is positioned between two unique positions, the FADEC will
select the limit of the higher mode for display
Two thrust setting mode are available, the autothrust mode and the manual
mode. The mode selection is depending on throttle lever position and upon the
autothrust activation/deactivation logic.
Autothrust Mode
The autothrust mode is only avalible between idle and maximum continuous
thrust ( MCT ) when the aircraft is in flight. The autothrust function (ATHR) can
be engaged or active. The engagement logic is done in the FMGC and the activation logic is implemented into the ECU.(The activation logic in the ECU unit
is based upon two digital discretes ATHR engaged, ATHR active, from the
FMGC,plus an analog discrete from the instinctive disconnect pushbutton on
the throttle.)
The ATHR function is engaged automatically in the FMGC by auto pilot mode
demand and manually by action on the ATHR push button located on the flight
control unit (FCU).
After take-off the lever is pulled back to the maximum climb position. The autothrust function will be active and will provide an N1 target for:
Max climb thrust
Optimum thrust
An aircraft speed ( Mach number )
A minimum thrust.
The ATHR de-activation and ATHR disengagement are achieved by action on
the disconnect pushbutton located on the throttle levers or by depressing the
ATHR pushbutton provided that the ATHR was engaged. Selecting the TLA in
IDLE or in reverse range will also disengage the ATHR function.
Alpha Floor Condition
If the Alpha Floor condition is not present, setting at least one throttle lever forward of the MCT gate leads to ATHR deactivation but maintains ATHR engaged ; the thrust is controlled by the throttle lever position and ATHR will be
FRA US/E Bu July99
activated again as soon as both throttles are set at or below MCT gate.
If the Alpha Floor condition is present, the ATHR function can be activated regardless of throttle position.
When ATHR is deactivated (pilot’s action or failure), the thrust is frozen to the
actual value at the time of the deactivation. The thrust will be tied to the throttle
lever position as soon as the throttles have been set out of the MCT or MCL
positions.
The thrust is frozen to the N1 actual if (memo thrust setting) :
1 ATHR was active in the FADEC unit
- and throttle is in MCT gate or MCL gate
- and one of the deactivation conditions is present ATHR not engaged (from
the ECU)
- or N1 target not valid
- or instinctive disconnect condition.
2 Thrust was frozen
- and condition to switch to manual thrust setting not present
- and condition to switch to automatic thrust setting not present.
Manual Mode
The thrust is controlled manually (i.e., function of TLA position) if the throttles
are not in the ATHR area.
This mode is also entered any time the conditions for autothrust or memo
modes are not present. In this mode, thrust lever sets an N1 value proportional
to the thrust lever position up to maximum take-off thrust.
TLA versus rated thrust is consistent regardless of ambient conditions.
TAKE-OFF/GO-AROUND ratings are always achieved at full forward throttle
lever position (except in Alpha-floor mode).
Other ratings (MAX CONTINUOUS, MAX CLIMB. IDLE, MAX REVERSE) are
achieved at constant throttle lever positions.FLEXIBLE TAKE-OFF for a given
derating is achieved at constant retarded throttle lever position.
Flexible take-off rating
FLEXIBLE TAKE-OFF rating is set by the assumed temperature method with
the possibility to insert an assumed temperature value higher than the maximum one certified for engine operation to provide for the maximum derate allowed by the certifying Authorities.
Page: Page: 188
Lufthansa Technical Training
For Training Purposes Only
Engine Fuel and Controls
FADEC Power Management
A319 / A320 / A321
CFM 56-5A
73-20
DETENT DETENT
Figure 97
FRA US/E Bu July99
DETENT
Thrust Lever Positions
Page: Page: 189
Lufthansa Technical Training
ENGINE FUEL & CONTROL
FADEC POWER MANAGEMENT
A319 / A320 / A321
CFM 56-5A
73-20
IDLE CONTROL
Minimum idle ( 58,8 % N2 ) is corrected for ambient temp >30°C
Then the N2 will increase.
The minimum idle should never be below 58,3% N2
Approach idle ( approx.70% N2 )
It varies as a function of Total Air Temperature ( TAT )and altitude.
This idle speed is selected to ensure sufficiently short acceleration time to
go around thrust and is set when the aircraft is in an approach configuration.(Flap Lever Position -” NOT UP”)
Bleed Idle = Bleed demand.
Bleed Idle command will set the fuel flow requested for ensuring correct aircraft ECS system pressurization ,wing anti ice and engine anti ice pressurization ( Pb-”ON” or valves not closed ) .
Reverse Idle ( approx.70% N2 ) = Approach Idle + 1000 RPM
FADEC sets the engine speed at reverse idle when the throttle is set in the
reverse idle detent position .
For Training Purposes Only
IDG Idle Bias (Min Idle - Approach Idle) = The min idle speed will increase to maintain the engine oil temperature within max limits( in flight
only ),when the engine oil temperature reach > 106 deg C (signal from
TEO sensor).The speed can increase up to approach idle.
Weater Idle Speed
On the ECU software P28 / P15 the new weater idle speed will be incorperated ( SB 73-131) .The purpose of this software eliminates the FCOM requirement that the pilot must manually select Nacelle Anti -Ice prior to
penetrating moderate to heavy precipitation weather conditions in order to
establish the minimum idle to 45% N1 .This software reduces pilot work
load.
FRA US/E Bu 03.98
Page: Page: 190
Lufthansa Technical Training
ENGINE FUEL & CONTROL
FADEC POWER MANAGEMENT
A319 / A320 / A321
CFM 56-5A
73-20
THRUST
LEVERS
TLA (REV. IDLE)
LANDING
GEARS
SLAT /
FLAP
LEVER
LGCIU
1/2
0
0
1
1
2
2
3
FULL
3
SFCC
1/2
AIR
LEVER NOT ZERO
Reverse
Idle
EIU
WOW (GRD)
Approach
Idle
EIU
EIU FAULT
Min. Idle
FULL
PACKs
ECS DEMAND
PACK
CONT.
1/2
ZONE
CONT.
Bleed
Idle
EIU
TEO
WING ANTI ICE
For Training Purposes Only
in FLT only
ENG ANTI ICE
HEAVY PRECIPITATION
WEATHER CONDITIONS
IDG Idle
Bias
Weather
Idle Speed
ECU
Figure 98
FRA US/E Bu 03.98
Idle Setting
Page: Page: 191
Lufthansa Technical Training
Engine Fuel and Control
FADEC Test
73-20
CFM56-5A
73-20
FADEC TEST
CFDS SYSTEM REPORT/TEST FADEC 1 (2)
The system report/test menu for the FADEC has eight options:
- LAST LEG REPORT
- PREVIOUS LEGS REPORT
- LRU IDENTIFICATION
- CLASS 3 FAULTS
- TROUBLE SHOOTING REPORT
- IGNITION TEST
- THRUST REVERSER TEST
- FADEC TEST
To get access to the FADEC CFDS menu the FADEC ground power switch on
the maintenance panel must be ”ON” ,otherwise ”NO RESPONSE” is displayed
on the MCDU.
LAST LEG REPORT
This report gives a list of the LRUs which have been detected faulty on the last
flight leg.
PREVIOUS LEGS REPORT
This report lists all the LRUs which have been detected faulty during the previous flight legs (max 62).
For Training Purposes Only
A319 / A320 / A321
EE
TROUBLE SHOOTING REPORT
This report presents a snapshot at the time a fault occured.It shows the time of
occurence and gives additional parameter infos.
N1 Actual Selection ( N1ACTSEL)
N2 Actual Selection (N2 ACTSEL)
EGT Selection (T49.5SEL)
Thrust Lever Angel Selection (TLASEL)
CDP Selection (PS3SEL)
Fuel Metering Valve Selection (FMVSEL)
VSV Selection (VSVSEL)
VBV Selection (VBVSEL)
Ambient Static Pressure Sel.(P0SEL)
TAT Selection (TATSEL)
Mach Outside (MO)
N1 Command (N1CMD)
IGNITION TEST
This test allows to perform a ignition test via the MCDU.
REVERSER TEST
This test allows to operate /test the reverser .
LRU IDENTIFICATION
This menu shows the ECU part number.The last digit of the number shows the
software standard (e.g. P02)
CLASS 3 FAULTS
This menu shows the class 3 faults.
FRA US/E Bu July 99
Seite: Page: 192
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Engine Fuel and Control
FADEC Test
A319 / A320 / A321
EE
CFM56-5A
73-20
For Training Purposes Only
refer to additional pages !
Figure 99
FRA US/E Bu July 99
FADEC CFDS Menu
Seite: Page: 193
Lufthansa Technical Training
Engine Fuel and Control
FADEC Test
EE
A319 / A320 / A321
CFM56-5A
73-20
CFDS SYSTEM REPORT/TEST FADEC 1 (2)
For the Test procedure refer to AMM TASK 73-29-00-710-040
FADEC TEST
This test allows to test the FADEC system , by seperate selection of channel A
or channel B.
A motoring or a non motoring test can be performed,depending if bleed air is
supplied or not.
When a motoring test is done the valves are driven with fuel press and all electrical circuits are checked.
A non motoring test is only a static electrical test.
For Training Purposes Only
NOTE.:
For the versions of the FADEC without the Bleed Bias System
installed,the class 3 message ”WB3 SENS,J15,ECU” or BLD SENSOR,J15, ECU will be displayed on each channel of the FADEC test report.This message must be disregarded if the Bleed Bias System is not
installed!
FRA US/E Bu July 99
Seite: Page: 194
Lufthansa Technical Training
Engine Fuel and Control
FADEC Test
A319 / A320 / A321
EE
CFM56-5A
73-20
For Training Purposes Only
refer to additional pages !
Figure 100
FRA US/E Bu July 99
FADEC Test
Seite: Page: 195
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
73-25
A321-131
CFM56-5A
73-25
ENGINE INTERFACE UNIT
EIU PRESENTATION
824
Two EIUs are fitted on each aircraft, one for engine 1, one for engine 2
Each EIU, located in the electronics bay 80VU, is an interface concentrator
between the airframe and the corresponding FADEC located on the engine,
thus reducing the number of wires. EIUs are active at least from engine starting
to engine shutdown, they are essential to start the engine.
80VU
The main functions of the EIU are:
- to concentrate data from cockpit panels and different electronic boxes to the
associated FADEC on each engine,
- to insure the segregation of the two engines,
- to select the airframe electrical supplies for the FADEC,
- to give to the airframe the necessary logic and information from
engine to other systems (APU, ECS, Bleed Air, Maintenance).
For Training Purposes Only
EIU INPUT DESCRIPTION
EIU input from the ECU
The EIU acquires two ARINC 429 output data buses from the associated ECU
(one from each channel) and it reads data from the channel in control. When
some data are not available on the channel in control, data from the other
channel are used.
In the case where EIU is not able to identify the channel in control, it will assume Channel A as in control.
The EIU looks at particular engine data on the ECU digital data flow to interface them with other aircraft computers and with engine cockpit panels.
EIU output to the ECU
Through its output ARINC 429 data bus, the EIU transmits data coming from all
the A/C computers which have to communicate with the ECU, except from
ADCs and throttle which communicate directly with the ECU.
There is no data flow during EIU internal test or initialization.
FRA US-T Bu
July 1999
EIU
EIU Location
Page: 196
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
A321-131
CFM56-5A
73-25
ECU
To CIDS (23-73 )
To DFDRS INTCON Monitoring (31-33)
To CVR power Supply (23-71 )
To Avionics Equipment Ventilation (21-26 )
To WHC (30-42 )
To PHC ( 30-31 )
To FCDC (27-95)
To Blue Main Hydraulik PWR( 29-12)
To Green Main HYD PWR RSVR Indicating (29-11)
To Yellow Main HYD PWR RSVR Indicating (29-13 )
For Training Purposes Only
ECU
ECU
To Blue Main HYD PWR RSVR Warning / Indicating
ECU
Figure 101
FRA US-T Bu
July 1999
EIU Schematic
Page: 197
Lufthansa Technical Training
For Training Purposes Only
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
A321-131
CFM56-5A
73-25
EIU INTERFACES
SIGNALS
PURPOSE
WING ANTI-ICE SWITCH
ENGINE BLEED COMPUTATION LOCIG
ENGINE FIRE P/B SIGNAL
FADEC ENGINE SHUTDOWN LOGIC
LOW OIL PRESSURE SWITCH (AND GROUND)
-COCKPIT WARNING SIGNALS
-HYDRAULIC MONITORING
-WINDOW AND PROBE HEATING SYSTEM
-AVIONIC VENTILATION SYSTEM
-RAIN REPELLENT SYSTEM
-CIDS,CVR,DFDR
FADEC GROUND POWER P/B
FADEC POWER SUPPLY LOGIC
LGCIU 1 AND 2 (GROUND SIGNAL)
THRUST REVERSER AND IDLE LOGIG
SFCC 1 AND 2
ENGINE FLIGHT IDLE COMPUTATION LOGIC
SEC 1 ,2 AND 3
THRUST REVERSER INHIBITION CONTROL
FLSCU 1 AND 2
FUEL RETURN VALVE CONTROL
ENGINE SELECTED
ENGINE 1 OR 2 INDENTIFICATION
OIL PRESSURE,OIL QUANTITY AND OIL TEMPERATURE
INDICATION ECAM
NACELLE TEMPERATURE
INDICATING (ECAM)
START VALVE POSITION (FROM EEC)
ECS FOR AUTOMATIC PACK VALVE CLOSURE, DURING
ENGINE START
N2 GREATER THAN MINIMUM IDLE (FROM ECU)
FUNCTIONAL TEST INHIBITION OF THE RADIO ALTIMETER TRANSCEIVER
-BLUE HYDRAULIC SYSTEM PUMP CONTROL
ENGINE START FAULT SIGNAL
ILLUMINATION OF FAULT LIGHT ON THE ENGINE START
PANEL
APU BOOST DEMAND SIGNAL (EIU)
MAIN ENGINE START MODE TO THE APU ELECTRONIC
CONTROL BOX
EIU INTERFACES CONT.
FRA US-T Bu
July 1999
Page: 198
A321-131
CFM56-5A
73-25
SIGNALS
PURPOSE
TLA IN TAKE-OFF POSITION (MIN. T/O N2, FROM ECU)
PACK CONTROLLER FOR INLET FLAP CLOSURE
-AVIONIC EQUIPMENT VENTILATION CONTROLLER
( CLOSED CIRCUIT CONFIGURATION )
-CABIN PRESSURIZATION COMPUTER PRE-PRESSURIZATION MODE
THRUST REVERSER (FROM SEC 1,2 AND 3 )
THRUST REVERSER INHIBITION RELAY
For Training Purposes Only
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
FRA US-T Bu
July 1999
Page: 199
A321-131
CFM56-5A
73-25
For Training Purposes Only
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
Figure 102
FRA US-T Bu
July 1999
EIU Schematic
Page: 200
A321-131
CFM56-5A
73-25
For Training Purposes Only
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
ENGINE INTERFACE UNIT
Figure 103
FRA US-T Bu
July 1999
EIU Schematic
Page: 201
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
CFDS EIU TEST
73-25
A319 / A320 / A321
CFM56-5A
73-20
EIU CFDS TEST
CFDS SYSTEM REPORT/TEST EIU
This Page shows the menu of the Engine Interface Unit ( EIU )
The EIU is a Type 1 System.
The EIU is availlable in CFDS back up Mode.
The following menu options are available for the EIU 1 (2):
LAST LEG REPORT
PREVIOUS LEGS REPORT
LRU IDENTIFICATION
CLASS 3 FAULTS
GROUND SCANNING
Last leg Report
Here are Displayed the Internal EIU Faillures that Occured during Last Flights.
Previous legs report
The EIU sends a list of the LRU‘s which have been detected faulty during the
previous 62 flight legs.
LRU Indentification
Shows the EIU part number.
For Training Purposes Only
Class 3 faults
This menu shows all class 3 faults present.
Ground scanning
This Page gives the EIU Faillures still presend on Ground.
RTOK means Re - Test Ok, you can ignore this Fault
FRAUS82 Bu
July 1999
Page: 202
Lufthansa Technical Training
ENGINE FUEL AND CONTROL
CFDS EIU TEST
A319 / A320 / A321
CFM56-5A
73-20
For Training Purposes Only
refer to additional pages
Figure 104
FRAUS82 Bu
July 1999
EIU Menu
Page: 203
Lufthansa Technical Training
Engine Air
General
ATA 75
75-20
A319 / A320 / A321
CFM56-5A
75-00
ENGINE AIR
ENGINE CLEARANCE CONTROL SYSTEMS,
GENERAL
Das CFM56-5A has 3 Clearance Control-Systems.These are:
the Rotor Active Clearance Control System (RACC)
the HPT Active Clearance Control System (HPTACC)
the LPT Active Clearance Control System (LPTACC)
For Training Purposes Only
Every system has a valve which controls the airflow.The valves are positioned
by fuel servo pressure controled by a servo valve installed on the HMU.
Every servo valve is equipped with a position feedback .The servo valves are
controlled by the ECU according a schedule.
FRA US/E Bu July 1999
Seite: Page: 204
A319 / A320 / A321
CFM56-5A
75-00
For Training Purposes Only
Lufthansa Technical Training
Engine Air
General
Figure 105
FRA US/E Bu July 1999
Active Clarance Control Systems
Seite: Page: 205
Lufthansa Technical Training
For Training Purposes Only
Engine Air
General
ROTOR ACTIVE CLEARANCE CONTROL SYSTEM
Note: Not installed on new CFM 56 engines!
Purpose
The rotor active clearance control system (RACC) is controlled by the FADEC
system which maintains HPC rotor blade clearance relative to HPC stator compressor case.
The RACC system modulates the fifth stage high pressure (HP) compressor
bleed air into the compressor rotor bore to vary and control the clearances. The
air flow to the rotor is mixed with the booster discharge air. By heating the compressor rotor with fifth stage bleed air, the compressor clearances are reduced
and improve the efficiency of the compressor and improving the overall Specific
Fuel Consumption (SFC) of the engine.
When the RACC valve is closed, the total air flow through the rotor is from the
booster discharge air and the clearances are maximized.
As the RACC valve opens, the amount and temperature of the air through the
rotor is increased due to the introduction of fifth stage bleed air, and the clearances are closed to optimize performance.
A319 / A320 / A321
CFM56-5A
75-00
ROTOR ACTIVE CLEARANCE CONTROL VALVE
The rotor active clearance control (RACC) valve is a butterfly valve with one
inlet port and one outlet port.
The valve has a RACC port and a PCR (case preesure from HMU) port and
consists of an outer housing, a rotating plate, and an integral fuel powered actuator with dual independent transducers for position feedback.
The inlet port receives 5th stage compressor bleed air which is modulated by
rotating the plate.
The RACC valve outlet port supplies modulated bleed air. The RAC valve is
located on the HPC compressor case at 12:00 o’clock.
RACC Control Valve
The ECU needs the following control signals to position the RACC valve:
N2
P0 (Altitude)
T3
M0
The valve stays in the closed position:
M0<0,3 and
T3>530 C
FRA US/E Bu July 1999
Seite: Page: 206
Lufthansa Technical Training
Engine Air
General
A319 / A320 / A321
CFM56-5A
75-00
HP ROTOR
CAVITY
5 TH
STAGE
RACC
VALVE
F/B
SIGNAL
F/B
SIGNAL
ECU
For Training Purposes Only
HMU
SERVO
VALVE
TM
CHA
OPEN
N2K
TM
OPEN
N2K
Figure 106
FRA US/E Bu July 1999
CHB
P0
N2
M0
T3
P0
N2
M0
T3
RACC System Schematic
Seite: Page: 207
Lufthansa Technical Training
For Training Purposes Only
Engine Air
General
A319 / A320 / A321
CFM56-5A
75-00
HP TURBINE CLEARANCE CONTROL SYSTEM
Purpose
The CFM56 engine high pressure turbine (HPT) clearance control system uses
high pressure compressor (HPC) bleed air from stages 5 and 9 to obtain
maximum steady-state HPT performance and to minimize exhaust gas
temperature (EGT) transient overshoot during throttle bursts. Air selection is
determined by fuel pressure signals from the hydromechanical unit (HMU).The
bleed air is ducted from the valve to a manifold surrounding the HPT shroud.
The temperature of the air controls the HPT shrouds clearance relative to the
HPT blade tips.
Description
The clearance control system supplies HPC bleed air from the 5th and 9th
stage air to the HPT shroud support to control the thermal expansion of the
shroud support structure. The bleed air is modulated by the electronic control
unit (ECU) in response to the shroud temperature sensed by the turbine
clearance control (TCC) sensor.
On engine start the HPTCC valve ports 9th stage air to unload the compressor
and enhance engine acceleration. At ground idle power setting, the air flow to
the HPT shroud is essentially from the HPC stage 9 bleed. When the throttle is
advanced or retarded to change the core engine speed, the air flow is regulated to maintain the optimum HPT shroud to blade tip clearance.
When the engine is shut down, the hydraulic actuator valve rod is retracted
to the start position.
The HPT Clearance Control Systems uses the following control signals:
N2
T3,
Tcase
The valve has 3 control schedules and is also used as a start bleed valve.
The 3 schedules are:
1. Steady State Schedule
2. Acceleration Schedule
3. Deceleration Schedule
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T CASE
SENSOR
-RHS-
T CASE
SENSOR
-LHS5 TH
9 TH
STAGE STAGE
For Training Purposes Only
LPT
START BLEED:
OPEN
DURING
ENGINE
START
HPTACC
VALVE
F/B
SIGNAL
HMU
SERVO
VALVE
TM
F/B
SIGNAL
ECU
CHA
HPTACC DEMAND
SCHEDULE
TM
FRA US/E Bu July 1999
T3
N2
T CASE
HPTACC DEMAND
SCHEDULE
CHB
Figure 107
T CASE
T3
N2
HPTACC System Schematic
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A319 / A320 / A321
CFM56-5A
75-00
HPT CLEARANCE VALVE
The high pressure turbine clearance control valve is a three-way valve with two
inlet ports, 5th and 9th stage, and two outlet ports. One outlet port provides a
start bleed function and the other outlet port flows a mixture of 5th and 9th
stage air to the turbine case. The valve consists of an outer housing, two metering plates, an axial moving contoured piston, and an integral fuel powered
actuator with dual independent transducers for position feedback. The piston
and the metering plates constitute variable orifices that achieve the proper mix
of 5th and 9th stage air.
For Training Purposes Only
T-Case Sensor
The 2 T-case sensors measure the temperatures in the HP Case and send this
signal to the ECU.The ECU then decides which air supply (5th or 9th stage)
must be used (cooling or heating)
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CFM56-5A
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C
T CASE SENSORS (TCC)
D
START BLEED
C
For Training Purposes Only
A
ECU
CHAN A+B
CLEARANCE
AIR
FLOW
D
752110 UAMO/AAMO
HPTACC VALVE
Figure 108
FRA US/E Bu July 1999
HPTCC Valve, Location and Bottom View
Seite: Page: 211
A319 / A320 / A321
CFM56-5A
75-00
LPTCC SYSTEM
Purpose
The low pressure turbine casing is cooled by fan discharge air sprayed
through an array of piping and small air jets that impinge on the outside
surface of the casing.
The LPT active clearance control system controlled by a valve through FADEC
system maintains LPT case shroud clearances relative to LPT rotor blade tips.
Operation
The ECU modulates the pressure of one of the piston chambers through the
HMU.
The HMU supplies a reference pressure to the second chamber.
The ECU controls the travel of the piston and valve butterfly according to
the engine parameters.
The butterfly of the valve opens when the engine rating increases and
closes when it decreases.
When the engine is shut down, the valve butterfly is fully open.
LPT cooling air flow, controlled by LPTACC valve depends on the operating
conditions and engine characteristics. Flow functions defined are validated
for ventilation calculation purpose.
The fan bleed air flow is modulated by ECU according to
the following engine operating conditions.
N1
P0
TAT
PT2
T12
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CFM56-5A
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FAN AIR
LPTACC
VALVE
F/B
SIGNAL
HMU
For Training Purposes Only
SERVO
VALVE
TM
TM
F/B
SIGNAL
ECU
CHA
LPTACC DEMAND
SCHEDULE
LPTACC DEMAND
SCHEDULE
CHB
PT2
P0
N1
T12
TAT
P0
N1
T12
TAT
PT2
Figure 109
FRA US/E Bu July 1999
LPTACC System Schematic
Seite: Page: 213
A319 / A320 / A321
CFM56-5A
75-00
LPT CLEARANCE CONTROL VALVE
LPT clearance control valve is a butterfly valve, the valve consists of an outer
housing, a control plate, a linear actuator, 2 RVDT sensors for feedback signals
and a butterfly valve actuation.
Under control of the PCR pressure applied at its head end and a PC/PB modulated pressure applied at its rod end, the linear actuator moves a rack controlling both the opening and closing of the butterfly valve which regulates the
amount of air required for cooling the turbine as a function of the engine operating configuration (engine rating).
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A319 / A320 / A321
CFM56-5A
75-00
CONNECTORS FOR
FEEDBACK CABLES
TO ECU
ACTUATOR
SUPPLY MANIFOLD
MOUNTING PLATE
For Training Purposes Only
FAN AIR
Figure 110
FRA US/E Bu July 1999
LPTCC Valve
Seite: Page: 215
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For Training Purposes Only
Engine Air
General
75-30
A319 / A320 / A321
CFM56-5A
75-00
COMPRESSOR CONTROL
VARIABLE BLEED VALVE SYSTEM
The variable bleed valve (VBV) position is related to the high pressure compressor (HPC) operation. It is directly controlled by the angular setting of the
variable compressor stator vanes at steady-state operation and during acceleration. The bleed valves open during low and transient operations to increase
the booster mass flow and to improve booster and HPC matching. The
bleed valves are fully open during fast decelerations. The bleed valve control
system includes the following:
The Electronic Control Unit (ECU) which controls the VBV position and
sends electrical signals to the Hydromechanical Unit (HMU).
An hydromechanical servo, integrated within the HMU, which supplies high
pressure fuel signals to a gear motor.
A power unit, which is a fuel-powered hydraulic gear motor. It operates under high pressure fuel from the HMU.
A mechanical transmission system which includes:
- A stop mechanism
- A bleed valve main flexible shaft assembly located between the master
ballscrew actuator and fuel gear motor.
- A master bleed valve with a master ballscrew actuator.
- 11 compressor bleed valves with ballscrew actuators
- 11 flexible shafts between the ballscrew actuatores.
- A position sensor (RVDT) connected to the master bleed valve.
The following control signals are used to position the VBV:
N1
N2
VSV-Position
FRA US/E Bu July 1999
VBV SCHEDULE
VBV
POSITION
OPEN
N1
CLOSED
61%
85%
N2
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A319 / A320 / A321
CFM56-5A
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VBV FEEDBACK ROD
VBV POSITION SENSOR
CONTROL LEVER
VBV POSITION SENSOR
SERVO
VALVE
MASTER BLEED ACTUATOR
FUEL
RETURN
For Training Purposes Only
MASTER BALLSCREW
ACTUATOR
FUEL GEAR
MOTOR
BALLSCREW ACTUATOR
Figure 111
FRA US/E Bu July 1999
VBV System, VBV Schedule
Seite: Page: 217
A319 / A320 / A321
CFM56-5A
75-00
VBV SYSTEM
The VBV actuation system provides an angular output through fuel gear
motor assembly, master ballscrew actuator assembly and 11 ballscrew
actuator assemblies. The system is interconnected by 11 flexible shaft
assemblies. Eleven ferrules are installed in the engine struts to provide
support for the flexible shaft assemblies.The system is designed to open,
close, or modulate the 12 VBV doors to an intermediate position in response to
an input command signal. The VBV’s remain fully synchronized throughout
their complete stroke by the continuous mechanical flexible shaft arrangement.
High pressure fuel hydraulically activates the VBV actuation system. The VBV
position sensor provides VBV position bias to the ECU. The master ballscrew
actuator assembly is connected by a push-pull feedback rod to the VBV position sensor.
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CFM56-5A
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VARIABLE
BLEED
VALVES 12
MASTER
B.V.
RVDT
RVDT
A
A
F/B
SIGNAL
**
FUEL GEAR
MOTOR
For Training Purposes Only
FUEL GEAR MOTOR
N1K
N2K
FROM VSV
CONTROL
VBV DEMAND
SCHEDULE
CHA
N1K
N2K
FROM VSV
CONTROL
VBV DEMAND
SCHEDULE
CHB
F/B
SIGNAL
ECU
TM
TM
SERVO
VALVE
HMU
753100 AAMO
753100 AGMO
Figure 112
FRA US/E Bu July 1999
VBV System
Seite: Page: 219
A319 / A320 / A321
CFM56-5A
75-00
VBV SYSTEM OPERATION
Modulating Operation
The motor, actuated by the HMU, drives the system to the commanded position with the required power. The pressure across the motor is reduced as the
system approaches the commanded position. The electrical position feedback
to the ECU directs the fuel control valve to its null position or minimum opening
needed to neutralize the bleed valve loads.
Bleed valves closing.
The feedback electrical mechanism relays the bleed valve position to the ECU
as the system approaches the commanded closed ECU position.The fuel control valve is moved towards the null position as the bleed valve approaches the
end of its stroke. This reduces motor speed and allows the motor to engage the
end-of stroke stops at a low impact force.
The closed bleed valve position is within 0.3 percent of the stroke of the ballscrew actuator assembly utilizing the mechanical stops.
Bleed valves opening
The feedback electrical mechanism relays the bleed valve position to the ECU
as the system approaches the commanded open position. The fuel control
valve is positioned to decelerate the motor.
The same type of mechanical stops are used at the opening end of the stroke.
The open bleed valve position is within one percent of the stroke of the ballscrew actuator assembly utilizing the mechanical stops. All the 12 bleed valves
are mechanically synchronized.
Stop Mechanism
The bleed valve stop mechanism assembly is a component of the Variable
Bleed Valve (VBV) actuation system. It is located between the bleed valve
fuel gear motor and master ballscrew actuator, on the aft face of the fan frame
at the 9’ o’clock position, aft looking forward.
Description
The function of the bleed valve stop mechanism assembly is to limit the number of revolutions of the bleed valve fuel gear motor to the exact number required for a complete cycle (opening-closing) of the VBV doors. This limiting
function supplies the reference position for installing and adjusting the VBV actuators.
The bleed valve stop mechanism consists of a housing for a hollow screw
which is driven by the bleed valve fuel gear motor. This hollow screw shaft
holds the main VBV flexible shaft which connects the bleed valve fuel gear motor to the master ballscrew actuator. A follower nut runs along the screw and
stops the rotation of the bleed valve fuel gear motor when it reaches the ends
of the screw threads.
A location is provided on the aft end of the bleed valve stop mechanism for
installation of a Rotary Variable Differential Transformer (RVDT).
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STOP MECHANISM
Ballscrew
Actuator
(11ea)
Flex Shafts (11)
Bleed Valves (12)
Feedback Rod
For Training Purposes Only
Position Sensor
Fuel Gear Motor
Main Flex Shaft
Stop Mechanism
Figure 113
FRA US/E Bu July 1999
VBV System Components
Seite: Page: 221
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CFM56-5A
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VBV DOORS & FLEX SHAFTS
VBV Doors
To improve the flowpath and hail ingestion capacity 12 VBV cast doors are
installed (except the VBV door in front of the T25 sensor, at the 4:30 o’clock
position).Eleven scoops and 9 slides are attached to the fan frame.
The VBV’s remain fully synchronized throughout their complete stroke by the
continuous mechanical flexible shaft arrangement.
VBV System Rigging
The rigging has to be done in the bleed valve closed position,which is established by using a setting yoke.
Refer to AMM Task 75-31-00-720 Adjustment/Test of the VBV System.
Flexible Shafts (11)
The flexible shaft assembly is an unshielded power core which has a
hexagon fitting on one end and an 8-point fitting on the other. A spring is attached to the hexagon end. The spring holds the shaft assembly in position
during operation and also permits easy removal of the shaft assembly.
For Training Purposes Only
Main Flexible Shaft (1)
The main flexible shaft assembly is an unshielded power core which is installed
between the stop mechanism and the main ball screw actuator. It has a hexagon fitting on one end and a splined end fitting on the other. A spring is attached to the spring end. The spring holds the shaft assembly in position during
operation and also permits easy removal of the shaft assembly.
Bleed Valve and Master Ballscrew Actuator Assembly
The master ballscrew actuator is located on the fan frame under fan
duct panel at the 9:00 o’clock position, aft looking forward.
The master ballscrew actuator is the unit which transfers the driving input from
the bleed valve fuel gear motor to the ballscrew actuator system. It consists of
a speed- reduction gearbox and a ballscrew actuator linked to a hinged door.
Speed reduction is consecutively carried out through one pair of spur gears
and then by 2 pairs of bevel gears. The last set of bevel gears drives the ballscrew.A lever, integral with the door, is connected to the position sensor. The
output motion of the first pair of bevel gears is transferred to the 10 other ballscrew actuators through flexible shafts driven by 2 ends of the output gear of
this pair of bevel gears.
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Figure 114
FRA US/E Bu July 1999
VBV Door Rigging & Flex Shaft
Seite: Page: 223
A319 / A320 / A321
CFM56-5A
75-00
VBV POSITION SENSOR
General
The VBV position sensor is of the Rotary Variable Differential Transducer
(RVDT) type. It is installed on the VBV stop mechanism.
It is electrically supplied provided by the Electronic Control Unit (ECU).
The Rotary Variable Differential Transformer (RVDT) senses the angular position of the entire VBV system and sends a corresponding signal to the ECU.
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ELECTRICAL CONNECTORS
CONTROL LEVER
For Training Purposes Only
RIG MARK
VBV POSITION SENSOR
(DUAL RVDT)
Figure 115
FRA US/E Bu July 1999
VBV Position Sensor / Rigging
Seite: Page: 225
A319 / A320 / A321
CFM56-5A
75-00
VARIABLE STATOR VANES
The variable stator vane (VSV) actuation system consists of 2 VSV hydraulic
actuators with dual independent transducers (LVDT) for position feedback, and
2 actuation mechanisms and linkages. Fuel pressure from the hydromechanical
unit is the hydraulic medium used to operate the VSV actuators.
Description
The VSV system positions the compressor variable stator vanes (IGV through
stage 3) to the angles necessary to provide optimum compressor efficiency at
steady state and provide adequate stall margin for transient engine operation.
Stator vane angle is a function of core engine speed (N2) and compressor
inlet temperature (T25).
The electronic control unit (ECU) schedules the VSV’s by controlling the VSV
actuation valve torque motor in the hydromechanical unit (HMU). The HMU
ports high pressure fuel to the rod end or head end of the VSV actuators and
vents the other end to bypass pressure. The actuator’s position transducer
(LVDT) transmits a feedback signal of actual vane position to the ECU for comparison to scheduled position.
Each VSV actuator is connected through a clevis link and the stage 3 bellcrank
to a master rod. Linkages connect the variable vane actuation rings to bellcranks that are connected to the master rod.
Connections between the actuator, clevis links, and master rod are made with
bolts and bushings for stability. All other linkages are connected with bolts and
uniballs to eliminate misalignment or binding.
The actuation rings, which are connected at the horizontal split-line of the
compressor casing, rotate circumferentially about the horizontal axis of the
compressor. Movement of the rings is transmitted to the individual vanes
through vane actuating levers.
VSV
POSITION
CLOSED
OPEN
TRANSIENT SCHEDULES
STEADY
STATE
SCHEDULE
appr. 30%
appr. 87%
N2K
For Training Purposes Only
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ACTUATION RING
BELLCRANK
ASSEMBLY
LEFT
VSV ACTUATOR
TO RIGHT VSV ACTUATOR
For Training Purposes Only
TO RIGHT VSV ACTUATOR
FEEDBACK FROM RIGHT VSV ACTUATOR
VSV
SERVO
VALVE
ECU
FEEDBACK
Figure 116
FRA US/E Bu July 1999
VSV System, VSV Schedule
Seite: Page: 227
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A319 / A320 / A321
CFM56-5A
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NACELLE COOLING
The nacelle installation is designed to provide cooling and ventilation air for engine accessories mounted along the fan and core casing.
The nacelle is divided in three major areas:
the engine air inlet
fan compartment
core compartment
For Training Purposes Only
The function of the nacelle components are:
- Sufficient airflow to offset the effects of engine case heat rejection and
engine flange air leackage,thereby maintaining an acceptacle compartment temperature level.
- Cooling of temperature critical components.
- Cowling pressure load limiting in the event of pneumatic duct failures.
- Ventilation of compartment during engine shutdown.
- Ventilation of combustible fluid vapors to prelude fires.
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Figure 117
FRA US/E Bu July 1999
Nacelle Cooling
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75-40
A319 / A320 / A321
CFM56-5A
75-00
NACELLE TEMPERATURE
NACELLE TEMPERATURE GENERAL
Purpose
A nacelle temperature probe measures core compartment temperature. It will
indicate overtemperature resulting from loose or broken air ducts or from loose
flanges, worn VSV bushings etc.
For Training Purposes Only
Description
The nacelle temperature indicating system is composed of a probe and an indicator on the ECAM. The nacelle temperature probe has a measurement range
of -55 deg. C to 300 deg. C (-67 deg. F to 572 deg. F).
The signal is fed to the EIU which transforms the analog information into digital
form. Then the EIU transmit the data to the ECAM system.
When the value reaches 240 deg. C the indication flashes (green advisory).
During engine starting, this parameter is replaced by the starter shutoff valve
position, the bleed air pressure indication and the selected ignitor.
FRA US/E Bu July 1999
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0.8 0.8
1.2 1.2
LOWER ECAM
DMC1
DMC2
DMC3
For Training Purposes Only
FWC1
EIU
FWC2
Figure 118
FRA US/E Bu July 1999
Nacelle Temp. Sensor / Indication
Seite: Page: 231
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Ignition System
General
ATA 74
IGNITION
74-00
GENERAL
DESCRIPTION
The Engine Control Unit (ECU) controls and monitors the start sequence either
in automatic or manual mode.
The ECU is able to abort the automatic start sequence in case of an incident:
start valve failure
ignition failure
HP fuel shut off valve failure
high EGT
engine stall
The system consists :
of a start valve
an air starter
two ignition boxes and
igniters (A&B).
The start valve is fitted with a manual override handle for mechanic intervention
on the ground.
For Training Purposes Only
CONTROL DESCRIPTION
Panel and Control Description
The Ignition System is controlled by:
ENG MODE Selector Switch
ENG MASTER Switch
ENG MAN START Pb
ECU
EIU
FRA US/E Bu July 1999
A319 / A320 / A321
CFM 56-5A
74-00
ENGINE Control Panel
It is installed on the Center Pedestal and comprises:
- ENG MODE Selector Switch
- ENG Master Switch (2)
- Annunciator FAULT Light (2)
- Annunciator FIRE Warning Light (2)
ENG MODE Selector Switch
-NORM Position
Normal Position after ENG start:
- in this Position the FADEC can select ignition automatically under the
following conditions:
Engine Anti Ice ON
EIU Failure
Engine Flame Out Detected
-IGN/ST ART Position
has to be selected for:
Normal Starting Procedure (Automatic)
Alternate Starting Procedure (Manual)
Continuous Ignition, when the engine is running.
when selected to IGN/Start :
Both pack valves are closed.
- If the engine start is not carried out within 30 sec the pack valves open
again.
FADEC is power supplied.
-CRANK Position
FADEC is PWR supplied
Ignition is inhibided,engine motoring is possible,when the ENG MAN START
P/B is pressed in.
Page: Page: 232
A319 / A320 / A321
CFM 56-5A
74-00
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Figure 119
FRA US/E Bu July 1999
Ignition system schematic
Page: Page: 233
Lufthansa Technical Training
Ignition System
General
CFM 56-5A
74-00
GENERAL
ENG MASTER Switch (2)
has a ON and a OFF position
-ON Position
Normal Starting Procedure (Automatic)
Alternate Starting Procedure (Manual)
Wet CRANKING Procedure
Normal Engine Operation
at Auto Start
- EGT Limit Pointer is set to 725°C
- N2 IND will be boxed in grey.
LP Fuel valve opens
HP Fuel shut off solenoid is deenergized (will be opend by fuel press )
-OFF Position
Resets the FADEC .
LP Fuel valve closes
HP Fuel shut off solenoid is energized to close position.
3.Annunciator FAULT Light (2) Amber
For Training Purposes Only
A319 / A320 / A321
installed on the 115 VU panel
each engine has Fault Light
triggert by the EIU
illuminated if there is a disagree between the position of the Master Switch
and the HP Fuel Sov (Pressurizing VLV) and after automatic start abort.
Manual Starting Procedure in the FADEC system.
EGT Limit Pointer will be set to 725’C
N2 Indication will be boxed in grey.
- OFF Position
Starter Air VLV Closed.
ENGINE
F.USED
Kg
1300
20
OIL
0
100
0
psi
42
20
c
IGN
A
PSI 35
20
qt
11 .5
0
1250
11 .4
100
0
44
20
VIB
N1
0.8
0.9
VIB
1.2
N2
1.3
OIL FILTER
CLOG
CLOG
F. FILTER
CLOG
CLOG
B
34 PSI
ENG MAN START PB’s (2)
are installed on the Overhead Panel, 22VU,
One P/B for each engine.
-ON (blue) Position
aktivation of the opening signal for the starter air valve
at manual start:
FRA US/E Bu July 1999
ENGINE Start Page
The engine start page appears when the ENG MODE Selector Switch is
turned to the IGN/START or CRANK position.
The starter valves and the duct press for each engine are displayed.
The operating ignition system is displayed.
Page: Page: 234
A319 / A320 / A321
CFM 56-5A
74-00
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Lufthansa Technical Training
Ignition System
General
Figure 120
FRA US/E Bu July 1999
Ignition system schematic
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Ignition System
General
A319 / A320 / A321
CFM 56-5A
74-00
IGNITION SYSTEM COMPONENTS
Ignition Boxes
Upper Box for system A.
Lower box for system B.
The ignition boxes trasform 115VAC-400Hz into high voltage (15 to 20 KV),to
charge internal capacitors .The discharge rate is of one per second and energy
delivered is 1,5 joules.
For Training Purposes Only
Ignitors
Right igniter for system A.
Left igniter for system B.
Precautions have to be taken before removel / installation
An ignition test is available through MCDU menus to verfy the ignition circuit.
FRA US/E Bu July 1999
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Ignition System
General
A319 / A320 / A321
CFM 56-5A
74-00
COOLING BOOSTER
AIR INLET
GROUND STRAP
SEALED FLEXIBLE
CONDUIT
IGNITION BOX
SYSTEM A
RIGHT
IGNITION
LEAD
LEFT
IGNITION
LEAD
POWER SUPPLY
CABLES
IGNITER CONTACT
IGNITION BOX
SYSTEM B
IGNITION LEAD
COOLING SHROUD
For Training Purposes Only
AFT LOOKING
FORWARD
8:00
LEFT IGNITER(B)
IGNITER
Figure 121
FRA US/E Bu July 1999
4:00
RIGHT IGNITER(A)
Ignition System Components
Page: Page: 237
A319 / A320 / A321
CFM 56-5A
74-00
HIGH TENSION LEADS COOLING
Ignition Leads
The are insulated wire type and fan air cooled in the core area. They transmit
electrical energy for ignition sparks.
The high tension leads are cooled by booster discharge air.
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Figure 122
FRA US/E Bu July 1999
Ignition System Comp. Installation
Page: Page: 239
A319 / A320 / A321
CFM 56-5A
74-00
IGNITION TEST WITH CFDS
TASK 74-00-00-710-040
**ON A/C ALL
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Ignition System
General
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74-00
For Training Purposes Only
refer to additional pages
Figure 123
FRA US/E Bu July 1999
CFDS Ignition Test
Page: Page: 241
A319 / A320 / A321
CFM 56-5A
74-00
IGNITION TEST WITHOUT CFDS
For the test procedure, refer to AMM TASK74-00-00-710-041-01
During the test,an aural check of the ignitor plug operation has to be
done.
WARNING: MAKE SURE THAT THERE IS ZERO PSI AT THE STARTER
VALVE INLET BEFORE YOU PUSH THE MAN START P/B.
READ THE PRESSURE ON THE ECAM START PAGE.
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General
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General
A319 / A320 / A321
CFM 56-5A
74-00
1. CHECK AIR PRESSURE AT START VALVE -
0
2. MODE SELECTOR TO-
IGN/START
3. MAN START P/B TO-
ON
4. MASTER LEVER-
ON
115VU
ON
NORM
For Training Purposes Only
OFF
ENG
1
Figure 124
FRA US/E Bu July 1999
Ignition Test without CFDS
Page: Page: 243
S
ATA 80
STARTING
80-00
GENERAL
A319 / A320 / A321
CFM 56-5A
80-00
The starting system of the engine utilizes pressurized air to drive a turbine at
high speed. This turbine drives the engine high pressure rotor through a reduction gear and the engine accessory drive system.
The air which is necessary to drive the starter comes from :
- either the APU
- or the second engine
- or a ground power unit.
The starter supply is controlled by a starter shut-off valve (SOV)
pneumatically operated and electrically controlled. In case of failure, the SOV
can be operated by hand.
The starter valve closes when the N2 speed reaches 50 %.
The starter centrifugal clutch disengages when N2 speed is higher than 50%.
Engine starting is controlled from the ENG start panel 115VU located on center
pedestal and ENG/MAN START switch on the overhead panel.
For Training Purposes Only
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Starting System
General
FRA US82 Bu July 99
Page: Page: 244
A319 / A320 / A321
S
CFM 56-5A
80-00
For Training Purposes Only
Lufthansa Technical Training
Starting System
General
Figure 125
FRA US82 Bu July 99
Starting Schematic
Page: Page: 245
Lufthansa Technical Training
Starting System
General
S
AIR STARTER
The starter is installed on the aft side of the accessory gearbox, in the righthand position (aft looking forward).
The starter is filled with oel to lubricate the gears inside.
it has a fill and overflow plug and
a magnetic drain plug.
Starter Limits
4x2 min ON - Inbetween 20 s OFF
( 15 min Cooling).
Sequence maybe Repeated.-
For Training Purposes Only
STARTER AIR VALVE
The starter air valve is electrical controled ( by a solenoid )and pneumatic operated. (diaphram and actuator) .
It will open when the solenoid is energized (28VDC) and airpressure is available.
Visual position indicator operation
The override handle aligns with markings on the valve to provide an external
indication of butterfly position.
Position switch operation
The normally open redundant electrical position switches are actuated by the
closing end of the actuator to provide remote indication when the butterfly is in
any position except closed.
Redundant solenoid
The solenoid has two independent coils, either one of which when energized
will open the valve.
A319 / A320 / A321
CFM 56-5A
80-00
WARNING :
TAKE CARE WHEN OPERATING THE STARTER SHUTOFF VALVE WITH
ENGINE RUNNING. OBEY TO SAFETY PRECAUTIONS .
Procedure:
Start the engine on which the starter air valve is fully operationnal.
Using the started engine pressure.
Start the engine on which the starter air valve is deactivated by operating
manually the starter shutoff valve through the access door 438CR (448CR).
After engine start cycle, check on starter valve that manual handle is in closed
position.
Install a warning notice in flight compartment indicating that pneumatic starter
valve system is inoperative.
Make an entry in the log book.
Starter Valve Manual Operation
STARTER VALVE MANUAL OPERATION
TASK 80-11-00-040-041
CAUTION :
DO NOT OPERATE THE MANUAL HANDLE OF THE PNEUMATIC
STARTER VALVE, IF THE STARTER SYSTEM IS NOT PRESSURIZED.
IF NOT DAMAGE TO THE PNEUMATIC STARTER VALVE CAN OCCUR.
FRA US82 Bu July 99
Page: Page: 246
A319 / A320 / A321
S
CFM 56-5A
80-00
For Training Purposes Only
Lufthansa Technical Training
Starting System
General
Figure 126
FRA US82 Bu July 99
Starter Air Valve and Starter
Page: Page: 247
Lufthansa Technical Training
Starting System
General
S
A319 / A320 / A321
CFM 56-5A
80-00
CRANKING-DESCRIPTION
Air Supply
The air necessary for the starting comes from the duct connecting engine
bleed and the precooler..
The air necessary for the starter is supplied by either:
- the other engine through the crossbleed system
- the APU and in that case, all the air bled from the APU is used for
starting
- an external source able to supply a pressure between 30 and 40 psig.
Dry Cranking
Requirement
A dry motoring of the engine will be needed when:
- it is necessary to eliminate any fuel accumulated in the combustion
chamber
- a leak ckeck of engine systems is needed.
For Training Purposes Only
To perform this operation, the starter is engaged and the engine is
motored but the HP fuel shut off valve remains closed and both
ignition systems are OFF.
An engine dry motoring can be performed for a maximum of three
consecutive cycles (4 of 2 minutes with a cooling period of 20 seconds between each cycles or 1 of 15 minute).
After three cycles or 4 minutes of continuous cranking, stop for a
cooling period of 30 minutes.
Dry Cranking Control
A selector switch is located on ENG panel 115VU.
Automatic Dry Cranking
An automatic selection of dry cranking is accomplished when the starting
sequence is aborted by the FADEC. This can be interrupted at any time by
placing the MASTER control switch in OFF position.
FRA US82 Bu July 99
Page: Page: 248
Lufthansa Technical Training
Starting System
General
A319 / A320 / A321
S
CFM 56-5A
80-00
PACKS OFF
PULL C/B: HP FUEL SO
V(only recommended if
fuel lines empty)
LP FUEL SOV OPENS (ECAM WARNING)
PUT MODE SELECTOR
TO ‘CRANK‘ POSITION
ECAM ENG START PAGE APPEARS
CHECK STARTER AIR PRESSURE
MIN. 25 PSI
PUSH ‘MAN START‘ PB TO ‘ON‘
START VALVE OPENS
MONITOR INDICATIONS
N2, N1 AND OIL PRESSURE MUST
INCREASE
AFTER MAX. 2 MINUTES
For Training Purposes Only
NORM
RELEASE ‘MAN START‘ PB TO OFF
START VALVE CLOSES,ENGINE INDICATIONS
-BACK TO ‘0‘
PUT MODE SELECTOR
TO ‘NORM‘ POSITION
ECAM ENG START PAGE
DISAPPEARS
PUSH C/B: HP FUEL SOV
LP FUEL SOV CLOSES
Figure 127
FRA US82 Bu July 99
Dry Cranking Procedure
Page: Page: 249
S
A319 / A320 / A321
CFM 56-5A
80-00
WET CRANKING
Wet Cranking
Requirement
A wet motoring will be needed when the integrity of the fuel system has to
be checked.
If such a test is performed, both ignition systems are off and the starter
is engaged to raise N2 up to the required speed of 20%. The MASTER control
switch is moved to ON and the exhaust nozzle of the engine carefully
monitored to detect any trace of fuel.
The wet motoring can be performed for a maximum of 4 consecutive
cycles (4 of 2 minutes with a cooling period of 20 seconds between each
cycles).
In all cases, the MASTER control switch will be returned to OFF and the starter
is reengaged automatically at 20% N2 and a engine motoring must be at least
done for 60 seconds to eliminate entrapped fuel or vapor.
For Training Purposes Only
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Starting System
General
FRA US82 Bu July 99
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Lufthansa Technical Training
Starting System
General
A319 / A320 / A321
S
CFM 56-5A
80-00
PULL IGNITION SYSTEM C/B‘S
PUSH ONE BOOST PUMP P/B
TO ‘ON‘
BOOST PUMP STARTS TO RUN
PUT MODE SELECTOR
TO ‘CRANK‘ POSITION
ECAM ENG START PAGE APPEARS
CHECK STARTER AIR PRESSURE
MIN. 25 PSI
PUSH ‘MAN START‘ PB TO ‘ON‘
START VALVE OPENS
MONITOR INDICATIONS
N2, N1 AND OIL PRESSURE MUST
INCREASE
WHEN N2 SPEED IS >20%
PUT ENG MASTER SWITCH TO ‘ON‘
FUEL FLOW INDICATION INCREASES
AFTER 10-20 SECONDS
PUT ENG MASTER SWITCH TO ‘OFF‘
NORM
FUEL FLOW INDICATION GOES TO ‘0‘
START VALVE CLOSES
For Training Purposes Only
WHEN N2 SPEED REACHES 20% THE ECU RE-ENGAGES THE STARTER
AFTER 60 SECONDS MOTORING
RELEASE ‘MAN START‘ PB TO OFF
START VALVE CLOSES,ENGINE INDICATIONS
-BACK TO ‘0‘
PUT MODE SELECTOR
TO ‘NORM‘ POSITION
ECAM ENG START PAGE
DISAPPEARS
Fuel Pumps OFF
Figure 128
FRA US82 Bu July 99
Wet Cranking Procedure
Page: Page: 251
Lufthansa Technical Training
Starting System
General
S
CFM 56-5A
80-00
AUTOMATIC START
The ECU fully controls the automatic start procedure of an engine till reaching
50% N2. The ECU protects the engine up to 50% N2 in case a Hot start,Hung
start,Stall or ignition fault occurs.The oil pressure is not monitored by the ECU
during engine start.This must be done by the operator who starts the engine.
Note:
There must be a positive oil pressure indication before the engine
reaches a stabilized ground idle.
UNSATISFACTORY STARTS DURING AUTO START
The Auto Start system has equipment that collects input on problems.
The equipment will automatically resequence the applicable control circuit to
correct the unsatisfactory condition.
Usually, the FADEC system is resequenced after a total of 4 cycles. If the problem is not corrected after resequencing, the applicable diagnostic indications
will be shown on the flight deck screen.
For Training Purposes Only
A319 / A320 / A321
Stall or Overtemperature
For either a stall or an overtemperature, the FADEC system will do the items
that follow:
Fuel is shut off for 7 seconds.
Starter and ignition stay ON.
At the end of the 7 seconds, the fuel is turned back on but, the fuel
schedule is reduced 7 percent.
If another stall or overtemperature occurs, the FADEC system repeats the
sequence and reduces the fuel schedule by 7percent more. The total
amount that the fuel schedule has been reduced at this point is 14 percent.
If a stall or overtemperature occurs a third time, the FADEC system will repeat the sequence and reduce the fuel schedule by 7 percent more. The
total amount that the fuel schedule has been reduced at this point is 21 percent.
If a stall or overtemperature occurs a fourth time, the start will automatically
be aborted and the applicable message will be indicated on the flight deck
screen.
FRA US82 Bu July 99
Starter air pressure is below 20 psi (1.3789 bar)
If the acceleration is below the threshold and a stall or overtemperature is indicated, the start will be automatically aborted if in auto start mode.
The fuel will not be turned on if the starter air pressure is too low to motor the
core to 22 percent N2, the start will be automatically aborted if in auto start
mode.
Hung Start during Autostart
If engine acceleration ceases and there has been no reduction in the acceleration fuel schedule and there is no stall or overtemperature indication, the start
will be automaticaly aborted if limits are exceeded.
If engine acceleration ceases and there has been a previous reduction in the
acceleration fuel schedule and there is no stall or overtemperature indication,
FADEC will automatically increase the acceleration fuel schedule to accomplish
acceleration to idle.
The FADEC system is resequenced after a total of 4 cycles. If the problem
is not corrected after resequencing, the applicable diagnostic indications will be
shown on the flight deck screen.
Ignition Fault
If the engine lightoff does not occur within 18 sec,the FADEC system automatically turns off the ignition,shuts the fuel flow and dry motors the engine for 30
sec.
Twenty five seconds into the dry motoring period,the FADEC system energizes
both igniters and at 30 sec,turns fuel flowback on.
If on this second engine start attempt there is no light off within 13 sec,the FADEC system automatically turns off both igniters,shut off the fuel flow and turns
the starter for 30 sec. to drymotor the engine.
This will result in a start abort indication on the upper ECAM.
Page: Page: 252
Lufthansa Technical Training
Starting System
General
A319 / A320 / A321
S
CFM 56-5A
80-00
Panel 115 VU
Panel 115 VU
-T urn Mode Selector to
IGN/START Position
ECAM ENG Start Page is displayed, the airpressure
( HP-Connection or APU ) must be 25 psi.
PACK VALVES ARE CLOSED (MAX 30 SEC)
-T urn Mode Selector to NORM
ENG
1
NORM
LOWER ECAM
Panel 115 VU
-Set the ENG-MASTER switch to ON
ENG
1
NORM
For Training Purposes Only
NORM
On the ENG Start Page:
- the starter valve symbole goes in line
(open)
-at 16% N2 the A or B indication comes in to
view below IGN.
-at 22% N2 FUEL FLOW indication,
180KG/H
-EGT rise (max. 20 sec. after FF).
-at 50% N2 the starter valve symbole must
go to cross line (closed)
- IGN OFF
-Check Oil Pressure min. 13psi.
Upper ECAM
-record the start EGT (R/U sheet)
-MONIT OR: N1, N2, EGT, FF
Figure 129
FRA US82 Bu July 99
Automatic Start Procedure
Page: Page: 253
S
A319 / A320 / A321
CFM 56-5A
80-00
MANUAL START
The manual start mode limits the authority of the ECU so that the pilot can
sequence the starter, ignition and fuel on/off manually.
This includes the ability to dry crank or wet crank.
Pushing the manual start push button off during dry cranking closes the starter
air valve and during wet cranking closes both the starter air and fuel shut off
valves.
The ECU continues to provide fault indications to the cockpit.
However, during manual operation, the ECU abort feature is disabled and
conventional monitoring of the start parameters is required.
The engine manual start panel, used for manual start, is located on the overhead panel and is composed of two manual start push button switches (one per
engine).
The manual start procedure commences when the mode selector is set to:
IGN/START,
the manual start push button switch is set to ON
and the master switch is OFF.
The starter air valve is then commanded open by the ECU.
When the master switch is turned ON during a manual start, both ignitors are
energized and fuel is turned on >22%.
Intermittent mode selector position has no effect on the manual start sequence
once the manual start procedure is initiated.
The starter air valve can be closed by selecting the manual start push button
switch OFF at any time prior to turning the master switch ON.
Once the master switch is turned ON, the manual start push button switch has
no effect on the start.
When the master switch is turned OFF, the control commands the HP fuel
valve and LP-fuel valve closed, the starter air valve closed and the ignitors off.
For Training Purposes Only
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Starting System
General
FRA US82 Bu July 99
Page: Page: 254
Lufthansa Technical Training
Starting System
General
A319 / A320 / A321
S
CFM 56-5A
80-00
Panel 115 VU
-T urn Mode Selector to
IGN/START Position
ECAM ENG Start Page is displayed, the airpreessure
( HP-Connection or APU ) must be 25 psi.
PACK VALVES ARE CLOSED (MAX 30 SEC)
Panel 115 VU
-T urn Mode Selector to NORM
ENG
1
NORM
NORM
Panel 122 VU
-Push the MAN START PB
-the blue ON light of this PB comes on.
On the ENG Start Page :
-the starter valve symbole goes in line (open).
-N2, Oilpressure and N1 must increase
Panel 122 VU
-release the MAN START PB
Panel 115 VU
For Training Purposes Only
-at 22% N2: set the ENG MASTER
switch to ON
-A and B IGN indication comes in to view
below IGN
-FUEL FLOW indication 180KG/H
ENG
1
-EGT rise (max. 20 sec. after FF
NORM
-at 50% N2 the starter valve symbole must
go to cross line (closed)
- IGN OFF
-Check Oil Pressure min. 13psi.
-record the start EGT (R/U sheet)
Figure 130
FRA US82 Bu July 99
Manual Start Procedure
Page: Page: 255
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
ATA 78
EXHAUST
78-30
THRUST REVERSER
A319 / A320 / A321
CFM 56-5A
78-30
INTRODUCTION
GENERAL
Thrust reverse is achieved by reversing the direction of the fan airflow using
four pivoting blocker doors.
Each door is operated by a hydraulic actuator. The actuator receives fluid from
a Hydraulic Control Unit which is controlled by the Electronic Control Unit.
For Training Purposes Only
A latch mechanism maintains each blocker door in the stowed position. The
latches are hydraulically released at the beginning of the deploy sequence.
Door positions are monitored by stow and deploy switches.
FRA US82 Bu July1999
Page: Page: 256
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
Figure 131
FRA US82 Bu July1999
Thrust Reverser Fan Airflow Stow/Deploy
Page: Page: 257
Lufthansa Technical Training
ENGINE EXHAUST
T/R SYSTEM GENERAL
THRUST REVERSER CONTROL
General
The Thrust Reverser System is controlled by the ECU of each engine.
The ECU incorporates a thrust reverser command logic based on throttle control lever selection, thrust reverser feedback position and ground/flight configuration, which generates a command signal to the pressurizing valve and the
directional valve in the HCU.
The signal from the ECU to the directional valve ,which is installed in the HCU,
is fed to the avionics compartment, where it passes through an inhibition relay
controlled by the Engine Interface Unit (EIU) according to throttle control lever
position and GRD Signal from the LGCIU.
Each channel of the ECU can control and monitor the thrust reverser.
The hydraulic energy required for the actuator is supplied from the normal hydraulic system.
For Training Purposes Only
Thrust Reverser Control
The thrust reverser control is based on a ECU logic which is based on the following conditions:
Thrust Control Lever Position (TLA)
Ground/Flight Configuration
Reverser Door Position (Stow- and Deploy switches)
Engine RPM , N2 >min IDLE .
The Hydraulic Control Unit controls the following functions on the reverser:
unlocking
deploying
stowing
locking
A319 / A320 / A321
CFM 56-5A
78-30
Stow Position
For determining the stowed position of the doors, there are four thrust reverser
single switches, one per door.
Thrust Reverse Indication
The thrust reverser operating sequences are displayed in the cockpit on the
ENGINE AND WARNING Display in the middle of the N1 dial with a REV Indication.
REV Indication amber = transit
REV Indication green = all doors in deploy position.
In deployment, an amber REV indication will come in view at the middle of the
N1 dial when at least one reverser door is unstowed or unlocked (stroke >1%).
If this occurs in flight, REV will flash first for 9 sec, then it will remain steady.
This indication will change to green colour when the four fan reverser doors are
fully deployed and the reverse thrust can be applied.
In stowage, the indication changes to amber when one door at least is less
than 95% deployed and disappears when all four doors are stowed.
Latches
There are four latches, one per blocker door. The latches hold the doors in the
stowed position and are located beside the actuators on the thrust reverser
forward frame. The latches are hydraulicly connected in series.
CFDS Interface
The reverser system is monitored by the CFDS.
The maintenance has the possibility to perform a reverser test via the MCDU.
With this test a engine running signal is simulated by the CFDIU.This allows a
reverser deployment.
Deploy Positon
The deployed position of the doors is sensed by two thrust reverser double
switches .
FRA US/T Bu July 1999
Page: Page: 258
Lufthansa Technical Training
ENGINE EXHAUST
T/R SYSTEM GENERAL
A319 / A320 / A321
CFM 56-5A
78-30
SEC 1
SEC 2 (3 )
OR
(WOW)
MAIN
LANDING
GEARS1&2
TLA
RESOLVERS
POTENTIOMETERS
CFDIU
4
10
N1
4
6 8
REV
35.5
FWC
LATCH
T/R
POSITION
CHANNEL B
10
REV
35.5
REVTEST
or
N2 >50%
AND
CHANNEL B
CHANNEL A
STOW
SW
DOOR
1
ACTUATOR
CHANNEL A
CHANNEL B
PRESS SW
SOV F
SUPPLY
HYDRAULIC
RETURN
INHIBITION
RELAY
DOOR
2
DEPLOY
SW
HCU T/R
DIRECT V SOL
PRESS V SOL
DIRECT V SOL
PRESS V SOL
Figure 132
FRA US/T Bu July 1999
6 8
MREV 70,0%
T/R
POSITION
CHANNEL A
E.C.U.
THRUST
LEVER
DMC
MCDU
T/R TEST
LGCIU 1/2
For Training Purposes Only
STATIC
RELAY
EIU 1/ 2
DOOR
3
DOOR
4
DEPLOY
SW
Reverser System Schematic
Page: Page: 259
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
THRUST REVERSER COMPONENTS (LRU ’S )
Actuators
There are four hydraulic actuators, mounted on the forward frame by a ball joint
assembly support.
They constitute a differential double-acting unit.
They are supplied by the HCU.
These hydraulic actuators have four different functions :
- to deploy doors
- to stow doors
- to assure a secondary lock in stowed position by a system of claws
- to ensure that doors rotation speed slows down at the end of the deploy
phase.
The actuators comprise a manual unlocking system for maintenance.
Hydraulic Control Unit (HCU)
Hydraulic Actuator (4)
Hydraulic Latch /4)
Piviting Doors (4)
Stow Switches (4)
Dual Deploy Switches (2)
Electrical Junction Box
For Training Purposes Only
Reverser Cowl (2)
Cowl Opening Actuator (2)
Handpump Connection (2)
HCU LOCATION
The HCU is mounted on the upper forward face of the right hand thrust reverser forward frame.The hydraulic control unit controls hydraulic fluid flow to the
thrust reverser latches and blocker door actuator. Control and feedbacksignals
are exchanged with the engine ECU.
FRA US82 Bu July 1999
Page: Page: 260
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
Figure 133
FRA US82 Bu July 1999
Engine Thrust Reverser LRU,s
Page: Page: 261
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
CFM 56-5A
78-30
REVERSER HYDRAULIC CONTROL UNIT
Reverser Hydraulic Control Unit ( HCU )
General
The HCU has the following functions :
- to supply pressure to hydraulic system (pressurizing valve)
- to regulate blocker doors stowing speed (flow limiter)
- to supply latches (directional valve solenoid)
- to supply actuators (directional valve).
The HCU incorporates the following items :
- pressurizing valve
- directional valve
- flow limiter
- filter and clogging indicator
- pressure switch
- bleed valve.
The aircraft hydraulic system is used as the supply source.
For Training Purposes Only
A319 / A320 / A321
Electrical characteristics :
Pressurizing valve solenoid and directional valve solenoid :
Each channel within the ECU shall interface with the thrust reverser
valve solenoids.
Each solenoid contains two electrically isolated, independent coils,
one dedicated to channel A and the other to channel B. Each of these
windings conforms to the following characteristics :
Each solenoid winding will be connected to the ECU via a two wire
cable.
Pressurizing valve
Pressurizing valve solenoid :
energized pressurizing valve open
deenergized pressurizing valve close
The pressurizing valve is a two position valve which is solenoid actuated to the
open position. The valve is spring loaded to the closed position (solenoid deenergized).
The pressurizing valve can also be manually closed and pinned (inhibited) to
prevent inadvertent actuation of the thrust reverser during maintenance work.
Energizing the valve solenoid opens a port . Then the hydraulic pressure
is supplied to the stow side of the actuators and to the directional valve .
FRA US82 Bu July 1999
In the pressurizing valve, there is a time delay system which limits the closing
time of the piston valve at 2 seconds minimum.
Directional Valve
Directional valve solenoid :
energized T/R deploy
deenergized T/R stow
The directional valve is a three port, two position, valve.
Energizing the valve solenoid opens a port allowing hydraulic pressure for the
door latches (the HCU pressurizing valve must be opened).
When the last latch is supplied the hydraulic pressure return moves a piston
valve to the deploy position.Then hydraulic pressure is ported to the deploy
side of the actuator piston .
Flow limiter
The flow limiter regulates the hydraulic fluid flow returning to the HCU from the
actuator piston head in order to control/limit the blocker door stowing rate under
varying conditions.
Bleed valve
The bleed valve permits bleeding of the HCU.
Pressure switch
The pressure switch indicates to the ECU that hydraulic circuit is pressurized or
not.Pressure switch signal is available to the ECU and can be used for maintenance purpose.
Filter and clogging indicator
The hydraulic control unit filter is used to filter the fluid supply from the aircraft
hydraulic system. The filter is a flow through cartridge type filter. The clogging
indicator monitors pressure loss through the filter cartridge and features a popout indicator to signal when it is necessary to replace the filter element.
Manual Lockout Lever
With the manual lockout lever it is possible to shut the hydraulic supply to the
reverser by closing the isolation valve in the HCU.The lever can be secured in
the lockout position with a pin.(this is also a part of blocking the reverser.)
This must always be done when working on the reverser system !
Page: Page: 262
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
Figure 134
FRA US82 Bu July 1999
Hydraulic Control Unit ( HCU )
Page: Page: 263
Lufthansa Technical Training
For Training Purposes Only
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
REVERSER OPERATION
Selection of either stow or deploy from the cockpit sends a signal to the engine
ECU which, in turn, supplies two independent signals to the thrust reverser
HCU pressurizing and directional control valves.
These signals to the HCU are only provided if the ECU has correct signals e.g.
reverser position engine power setting.
Stow Configuration
In the initial stowed position with the reverse stow control selected in the cockpit, the hydraulic pressure is applied to the input of the HCU.
All reverser hydraulic systems are pressurized at the return pressure as long
as the aircraft is in flight and, no signal is sent to open the pressurizing valve
solenoid.
Deploy sequence
When reverse thrust is selected in the cockpit, the ECU controls that deploying
conditions are achieved. In that case, the electrical power (28VDC) is sent topressurizing valve solenoid and to the directional valve solenoid.
Deployed Position Selected - Latches Unlocking
A. When the pressurizing valve is opened and that the directional solenoid
is energized, high pressure (HP about 3000 psi) is routed to the hydraulic actuator rod side, pressure signal is sent to aircraft system : blocker
doors unlocking sequence starts.
B. When the last latch is opened, the pressure drives the directional valve
which enables to supply hydraulic actuator heads with pressure.
C. As soon as one blocker door is at more than one percent of angular
travel, its stow switch changes over and sends signal ”1 or 2 or 3 unstowed doors” to the ECU. In the cockpit an amber REV indication is
displayed in the middle of the Signal ”unstowed doors” will not be send
to the ECU until all blockers doors are at more than one percent of their
angular travel .
D. Each blocker door arriving at 95 percent of its travel is slowed down until
completely deployed through hydraulic actuator inner restriction: at this
moment the switch is also activated.When the four blocker doors are
deployed the ECU receives the ”deployed doors” information and stops
pressurizing valve solenoid supply.REV indication changes to green.
Latches remain in temporary doors stowing position.
FRA US82 Bu July 1999
Stow sequence
E. When blocker doors stowing is selected, the ECU controls that stowing
conditions are achieved. In that case, the ECU reverses the electrical
signals of the end of deploying sequence. Pressurizing valve solenoid is
energized, directional valve solenoid de-energized. When one door is at
less than 95% of his travel, REV indication changes to amber colour.
F. Pressurizing valve opens and hydraulic actuator rods are supplied.
Hydraulic actuator heads are connected to return.A flow limiter controls
hydraulic actuator pistons retraction speed.
G. When all blocker doors are at one percent from their stowed position
they activate the switches which send the ”stowed door” information to
the ECU. The REV indication disapears .
H. The ECU cuts pressurizing valve solenoid electrical supply. The pressurizing valve closure temporisation of one to two sec.enables hydraulic
actuators to perform the end of stroke. The actuators actually bring the
pivoting doors to an overstowed position of approximately 2 mm (0.08
in.) in order to engage the latches. Latch hooks get engaged.
I. The end of temporisation connects all circuits to return. The pressure
switch transmits signal ”without pressure” to the ECU.
Page: Page: 264
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
LATCH ACTUATORS
1
1
2
2
3
3
4
4
For Training Purposes Only
SOV
DOOR ACTUATORS
Figure 135
FRA US82 Bu July 1999
HCU Schematic
Page: Page: 265
A319 / A320 / A321
CFM 56-5A
78-30
LATCHES
There are four latches, one per blocker door. The latches hold the doors in the
stowed position and are located beside the actuators on the thrust reverser
forward frame. The latches are connected in series.In case a latch fails the hydraulic actuators which deploy or stow the pivoting doors have a secondary
lock.
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
FRA US82 Bu July 1999
Page: Page: 266
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Manual
Unlocking Axis
5/16 inch
Figure 136
FRA US82 Bu July 1999
Latch
Page: Page: 267
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
HYDRAULIC ACTUATOR
There are four hydraulic actuators,mounted on the forward frame by a ball joint
assembly support.
These hydraulic actuators have four different functions:
to deploy the doors,
to stow the doors,
to ensure a secondary lock in stowed position,
to ensure that the doors rotation speed slows down at the end of the deployment phase.
The actuators comprise a manual unlocking system for maintenance.
For Training Purposes Only
Door latch failure
If a door latch breaks, the actuator has a secondary lock. This prevents the
door from moving more than 1/2 inch from the stowed position.This movement
is sufficient to actuate the unstow switch to provide a warning in the cockpit.
FRA US82 Bu July 1999
Page: Page: 268
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
NORMAL CONDITION
For Training Purposes Only
DOOR LATCH FAILURE
FAILED LATCH
ACTUATOR LOCKED
Figure 137
FRA US82 Bu July 1999
Hydraulic Actuators
Page: Page: 269
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
STOW SWITCH
Stow switch (4)
For determining the stowed position of the doors, there are four thrust reverser
single switches, one per door, located onto the forward frame rear side next to
the latches.The switches are dual, i.e. they include 2 cells one dedicated to
each channel of the ECU. The switches are connected to the ECU via the electrical junction box.All stow switches are connected in parallel.At 0.9% of blocker
doors flush position , the cells are closed .
For Training Purposes Only
Thrust Reverse Indication
The thrust reverser operating sequences are displayed in the cockpit on the
ENGINE AND WARNING Display in the middle of the N1 dial with a REV Indication.
REV Indication amber = transit
REV Indication green = all REV doors in deploy position.
In deployment, an amber REV indication will come in view at the middle of the
N1 dial when at least one reverser door is unstowed or unlocked (stroke >1%).
If this occurs in flight, REV will flash first for 9 sec, then it will remain steady.
This indication will change to green colour when all the fan reverser doors are
fully deployed and than the reverse thrust can be applied.
In stowage, the indication changes to amber when one door at least is less
than 95% deployed and disappears when all the 4 doors are stowed.
FRA US82 Bu July 1999
Page: Page: 270
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
LATCH
Figure 138
FRA US82 Bu July 1999
Stow Switch
Page: Page: 271
A319 / A320 / A321
CFM 56-5A
78-30
DEPLOY SWITCH
Description
The deployed position of the doors is sensed by two thrust reverserdouble
switches :
one for the two right side doors and one for the two left side doors.
They are located between the corresponding doors in 3 and 9 o’clock beams.
One single switch includes 2 cells one for each ECU channel. Junction wires
inside the switch are bedded in grease to avoid friction wear problems.
The switches are connected to the ECU via the electrical junction box.
For each door, one cell is connected to ECU channel A, the other one
to channel B. All doors are electrically connected in series.
Each time a door reaches 95% of its travel, the circuit closes.
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
FRA US82 Bu July 1999
Page: Page: 272
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
DEPLOY SWITCH
For Training Purposes Only
DEPLOY SWITCH
Figure 139
FRA US82 Bu July 1999
Deploy Switch
Page: Page: 273
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER SYSTEM
78-37
A319-114
CFM56-5A5
78-37
THRUST REVERSER IDEPENDENT LOCKING SYSTEM
”THIRD LINE OF DEFENCE”
SYSTEM OPERATION
To protect the thrust reverser system against inadvertent deployment, an additional and independent thrust reverser locking device ( third line of defence ) is
installed on the aircraft.
For each engine, a shut-off valve is introduced between the Hydraulic Control
Unit ( HCU ) and the associated Aircraft hydraulic unit. The shut-off valve
( SOV ) is installed under the engine pylon ( on the FWD secondary structure in
the fan compartment ).
The opening / closure command of this SOV is provided through an aircraft
logic, completely independent from the basic thrust reverser. FADEC command
and monitoring logic/circuitry.
Each SOV opening / closure is obtained from the Throttle Control Unit ( TLA
signal -3.8deg. ) and Spoiler Elevator Computers ( SEC ) which command a
static relay to control 115 VAC power supply to the SOV solenoid.
The Engine Interface Unit ( EIU ) receives the TLA signal -3.8deg. from
another position switch of the Throttel Control Unit, to energize the inhibition
relay.
Shut-Of f Valve Opening/Closing Operation.The hydraulic power for the thrust
reverser operation is obtained from the engine driven pump of the hydraulic
system (ref. 29-10-00), which supplies the HCU through the filter and the
thrust reverser SOV. The thrust reverser SOV is designed to isolate the thrust
reverser from the aircraft hydraulic system. The solenoid valve is de-energized
closed. When the supply port is closed the thrust reverser is isolated from the
aircraft hydraulic system.When the solenoid is energized the valve opens.
The thrust reverser SOV is commanded in the open position when the following
conditions are satisfied:
- aircraft is on ground proximity (less than 10 ft)
- reverse thrust is selected
- high forward thrust not selected on opposite engine.
The SOV valve solenoid is supplied with 115 VAC through a dedicated and
physically segregated wiring. This power supply to the SOV is controlled by a
power relay commanded by a static relay. The power relay coil is enegized to
open the SOV and de-energized to close the SOV. Its energization/de-energization is controlled through the 28VDC static relay which is piloted by the
SEC (SEC 1 or 2 for engine 1 and SEC 1 or 3 for engine 2).
COMPONENT DESCRIPTION
For Training Purposes Only
Shut-Off Valve
The thrust reverser Shut-Off Valve (SOV) is a 3 port, two position spool valve.
It is controlled by a solenoid driven 3 port, two position normally open pilot
valve. Electrical power is supplied to the SOV through the fan electrical feeder
box.
Filter and Clogging Indicator
It is used to filter the fluid from the aircraft hydraulic system. The filter is a flowthrough cartridge-type filter. The clogging indicator monitors the pressure loss
through the filter cartridge and has a pop-out indicator to signal when it is necessary to replace the filter element.
The filter assembly contains a check valve to permit the removal of the canister
and the change of the filter element with a minimum of spillage.
FRA US-T Bu
July 1999
Page: 274
Lufthansa Technical Training
ENGINE EXHAUST
THRUST REVERSER SYSTEM
A319-114
CFM56-5A5
78-37
For Training Purposes Only
NEW
Figure 140
FRA US-T Bu
July 1999
T/R Independent Locking System
Page: 275
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
THRUST REVERSER DEACTIVATION
Refer to MEL Maintenance Procedure 78-30-01
Thrust Reverser Deactivation
This is done when a reverser system fault occured and the aircraft is dispatched according to MEL.
The reverser is deactivated by turning the control lever on the HCU to
”OFF” and inserting the pin.
And inserting the 4 lockout bolts in each blocker door to prevent it from
opening.
For Training Purposes Only
HCU Lock-Out
is performed:
through Deactivation Lever
- the HCU is in Bypass Position
This must be performed,to:
- operate the Blocker Doors manually (by hand) for Maintenance Actions.
- prevent Reversersystem from unwanted operation.
- deactivate the Reverser.
FRA US82 Bu July1999
Page: Page: 276
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
Hydraulic Control Unit (HCU)
Lockout Pin
Lockout Bolt
Pivoting Door
Actuator
Lockplate
Lockout Fairing
For Training Purposes Only
Pivoting Door
Latch
Pivoting Door
HCU Lockout
Lever in „OFF“ position
Lockout Bolt
Storage Bracket for
Lockout Bolts
Figure 141
FRA US82 Bu July1999
Thrust Reverser Deactivation
Page: Page: 277
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
MANUAL DEPLOYMENT OF THE BLOCKER DOOR
TASK 78-32-41-860-040
A On the panel 115VU:
- Put a warning notice to tell persons not to start the engine 1(2).
B. Make sure that the engine 1(2) has been shut down for at least
5 minutes.
C. On the panel 50VU:
- Make sure that the ON legend of the ENG/FADEC GND PWR/1(2)
pushbutton switch is off.
- Install a warning notice.
D. Open the fan cowl doors:
E. Put the access platform in position.
F. Make the thrust reverser unserviceable.
Procedure
For Training Purposes Only
A.Using a 5/16 in. wrench turn the manual unlocking knob on the latch to
the unlock position.
NOTE :
The manual unlocking knob is located on slots aside of the latch.
Check the secondary lock of the actuator.
B.Turn the manual unlocking square on the actuator to the unlock position.
NOTE :
The pivoting door automatically disengage from its hook.
CAUTION :
DO NOT PUSH ON THE STOW SWITCH LEVER WHEN BLOCKER DOOR
IS OPENED OR DAMAGE COULD OCCUR.
C. Open the pivoting door by manually pulling on its edge.
FRA US82 Bu July 1999
Page: Page: 278
A319 / A320 / A321
CFM 56-5A
78-30
For Training Purposes Only
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
Figure 142
FRA US82 Bu July 1999
Manual Deployment
Page: Page: 279
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
OPERATIONAL TEST OF THE T/R WITH CFDS
PROCEDURE:
Pressurize hydraulic system:
FOR 1000EM1 Pressurize the Green hydraulic system with the Yellow
hydraulic system through the PTU .
On the lower display unit of the ECAM system:
Make sure that the HYD page shows that the pressure of the Green
system is 3000 PSI.
FOR 1000EM2 Pressurize the auxiliary Yellow hydraulic system.
On the lower display unit of the ECAM system:
Make sure that the HYD page shows that the pressure of the Yellow
system is 3000 psi (206.8427 bar).
On the panel 50VU:
- release the FADEC GND PWR 1 (2) pushbutton switch (on the pushbutton
switch, the ON legend is on).
- release the HYD/LEAK MEASUREMENT VALVES/B/G/Y pushbutton
switches (on the pushbutton switch the OFF legend comes on)
On the panel 23VU:
- make sure that the SEC1 pushbutton switch is on (on the pusbutton switch
the OFF legend is off).
On the left or right MCDU, get the SYSTEM REPORT/TEST ENG page
For Training Purposes Only
Do this test:
NOTE : This test can be done through the channel A or B of the FADEC 1(2)
Thrust Reverser Test
ACTION:
RESULT:
Push the line key adjacent to the T/R The THRUST REVERSER TEST
Test indication to get in the T/R TEST menu comes into view.
program.
Push the line key adjacent to the PUSH BUTTON TO START TEST
FRA US82 Bu FEB.95
The WARNING TEST ACTIVE indication comes into view.
Put the throttle control lever in the
IDLE REVERSE position
- The thrust reversers of the engine
1(2) operate.
On the upper display unit of the
ECAMsystem:
- The REV indication in the N1 indicator of the engine 1 (2) must be
amber when the thrust reversers operate.
- It must become green when the
thrust reverser are full deployed.
NOTE : If you do not perform the subsequent step immediately install a
warning notice on the throttle control lever of the engine 1(2) to prohibit anymovement of the lever
Put the throttle control lever in the
IDLE position
- The thrust reversers of the engine 1
(2) retard
On the upper display unit of the
ECAM system:
-The REV indication must be amber
when the thrust reversers operate.
- It must go out of view when thethrust reversers are stowed andlocked.
Push the line key adjacent to the RETURN indication
-TR TEST REPORT comes into view.
WARNING :
YOU MUST USE THE LINE KEY ADJACENT TO THE ”RETURN” INDICATION TO COMPLETE THE TEST. IF YOU COMPLETE THE TEST WITH
THE ”MCDU MENU” KEY, THE TEST WILL STAY IN OPERATION FOR
ONE MINUTE WITH NO INDICATIONTO MAINTENANCE PERSONNEL. IF
A PERSON MOVES THE THROTTLE CONTROL LEVER IN THIS ONE
MINUTE, UNWANTED MOVEMENT OF THE THRUST REVERSER CAN
OCCUR.
Push the line key adjacent to the RETURN indication
-The ENGINE 1(2) MAIN MENUcomes into view.
Do the procedure again for the channel B of the FADEC 1(2).
Page: Page: 280
Lufthansa Technical Training
Engine Exhaust
Thrust Reverser System
A319 / A320 / A321
CFM 56-5A
78-30
ENGINE 1 CHANNEL A
THRUST REVERSER TEST
ENGINE 1 CHANNEL A
IGN TEST >
< LAST LEG
REPORT
< PREVIOUS LEG
REPORT
T/R TEST >
PREPARE AIRCRAFT SYSTEMS
FOR T/R OPERATION
T/R WILL DEPLOY WHEN TLA
IS IN THE REVERSE REGION
T/R WILL STOW WHEN TLA IS
IN FORWARD REGION
FADEC TEST >
< LRU IDENT
< TROUBLE SHOOTING
REPORT
< CLASS 3 FAULTS
REPORT
< RETURN
PUSH BUTTON TO
START TEST >
PRINT >
< RETURN
THRUST REVERSER TEST
THRUST REVERSER TEST
ENGINE 1 CHANNEL A
ENGINE 1 CHANNEL A
LEG
For Training Purposes Only
*********** WARNING ** *********
*********
TEST ACTIVE ********
DATE
GMT
ATA
NO FAULTS RECORDED
AT END OF TEST RETURN
TLA TO FORWARD
THRUST REGION TO
STOW T/R
< RETURN
< RETURN
Figure 143
FRA US82 Bu FEB.95
CFDS T/R Test
Page: Page: 281
Lufthansa Technical Training
Engine
Engine Change
71-00
A319 / A320 / A321
CFM 56-5A
71-00
ENGINE CHANGE
ENGINE REMOVAL / INSTALLATION
The arrangements for slinging / hoisting the engine are shown below
( Bootstrap).
For furter information refer to AMM 71-00-00-400
Fan / Reverser Cowls Supports for Engine Removal
For Training Purposes Only
After a new engine was installed different Test Tasks have to be performed:
Check of engine datas via CFDS ( ESN,ECU P/N, Engine Rating, Bump
level etc.) to make sure that they are the same as written on the ECU, data
entry plug and engine identification plates.
Operational Test of ECU via CFDS.
If A/C is operated in actual CAT III conditions,a Land Test must be performed.
Functional check of IDG disconnect system.
Functional check of engine ice protection system.
Dry motor leak check
Wet motor leak check
Idle leak check
FRA US82 Bu July 1999
Page: Page: 282
A319 / A320 / A321
CFM 56-5A
71-00
For Training Purposes Only
Lufthansa Technical Training
Engine
Engine Change
Figure 144
FRA US82 Bu July 1999
Engine Removal / Installation
Page: Page: 283
A319 / A320 / A321
CFM 56-5A
71-00
STUDENT NOTES:
For Training Purposes Only
Lufthansa Technical Training
Engine
Engine Change
FRA US82 Bu July 1999
Page: Page: 284
A319 / A320 / A321
CFM 56-5A
71-00
For Training Purposes Only
Lufthansa Technical Training
Engine
Engine Change
Figure 145
FRA US82 Bu July 1999
Engine Connections
Page: Page: 285
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
A319 / A320 / A321
CFM 56-5A
en
ATA 30
30-21
ICE AND RAIN PROTECTION
Vacbi File: ENGINE ANTI ICE SYSTEM PRESENTATION
30-20
AIR INTAKE ANTI-ICE PROTECTION
ENGINE AIR INTAKE ANTI-ICE SYSTEM
PRESENTATION
Source
Air is bled from High Pressure Commpressor 5th Stage of each Engine.
For Training Purposes Only
Valve
For each Engine, hot bleed air is ducted via an ”ON/OFF” valve.
The valve is pneumatically operated,electrically controlled and spring loaded
closed.
Upon energization of the solenoid, the valve will close.
In case of loss of electrical power supply and pneumatic air supply available,
the valve will open.
It has a “Manual Override and Lock”. It can be blocked in the OPEN or in
the CLOSED position.
Control
For each engine, the”ON/OFF” valve is controlled by a pushbutton.
Continuos ignition is automaticaly activated when the valve is opened.
The ”FAULT” light comes on during transit or in case of abnormal operation.
When the anti-ice valve is open, the zone controller determines the bleed air
demand for the Full Authority Digital Engine Control (FADEC) system.
When the anti ice valve is open (valve position sw. NOT CLOSED), the zone
controller sends a signal to the FADEC (ECS signal), this will:
Modulate the Idle speed to Min.PS3 Schedule Demand for both engines.
Switch the Cont. Ignition- ON (via EIU/ECU).
OFF - (PB-Switch Out)
Anti ice system is OFF (valve solenoid energized).
FAULT - (PB Switch In, Amber)
Fault light illuminates amber when valve not fully open.
FAULT - (PB-Switch Out, Amber)
Fault light illuminates amber.
The ECAM is activated
- Single chime sounds
- MASTER CAUT light ”ON”
- Warning message:
- ANTI ICE ENG 1 (2) VALVE CLSD
- ANTI ICE ENG 1 (2) VALVE OPEN.
ECAM Page
If at least one of the two engine air intake anti-ice systems is selected ”ON”, a
message appears in GREEN on the ”ECAM MEMO” display.
ON - (PB-Switch In, Blue)
The ON light comes on in blue. (valve solenoid deenergized) .
ENG ANTI ICE ON is indicated on the ECAM MEMO page.
Nl Limit is corrected
FRA US-E Bu July 1999
Page: Page: 286
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
A319 / A320 / A321
CFM 56-5A
en
30-21
ENGINE 1
ANTI-ICED
AREA
FADEC
ON-OFF VALVE
CABIN
ZONE
CONTROLLER
OPEN POSITION
SIGNAL
For Training Purposes Only
ANTI ICE
Figure 146
FRA US-E Bu July 1999
ENG 1
ENG 2
FAULT
ON
FAULT
ON
Engine Nacelle Anti Ice System
Page: Page: 287
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
A319 / A320 / A321
CFM 56-5A
en
30-21
2
For Training Purposes Only
1
Figure 147
FRA US-E Bu July 1999
Engine Nacelle A/I Architecture
Page: Page: 288
A319 / A320 / A321
CFM 56-5A
en
30-21
For Training Purposes Only
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
Figure 148
FRA US-E Bu July 1999
ECAM Messages
Page: Page: 289
en
A319 / A320 / A321
CFM 56-5A
30-21
ENGINE NACELLE ANTI ICE VALVE OVERRIDE
refer to MEL.
Procedure
Lock the intake anti-ice valve in the open or the closed position:
Remove the lock-pin from the transportation hole in the valve.
Use an applicable wrench on the nut and move the valve to the necessary
position (open or closed).
Hold the valve in the necessary position and install the lock-pin in to the
valve locking hole.
For Training Purposes Only
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
FRA US-E Bu July 1999
Page: Page: 290
Lufthansa Technical Training
Ice and Rain Protection
Engine Anti Ice
A319 / A320 / A321
CFM 56-5A
en
30-21
ELECTRICAL
CONNECTION
MANUAL OVERRIDE
REMOVE STOWED
PIN-ROTATE TO
DESIRED POSITION
INSTALL PIN IN
LOCKED POSITION
CL LOCK
OP
ACTUATING
PRESSURE
9TH STAGE
ANTI-ICE
SUPPLY 5TH
STAGE
For Training Purposes Only
STOW
Figure 149
FRA US-E Bu July 1999
Engine Nacelle Anti ice Valve
Page: Page: 291
Lufthansa Technical Training
POWERPLANT
STUDENT RESPONSE QUESTIONS
CFM 56-5A
71-80
STUDENT RESPONSE QUESTIONS
SELF EXAMINATION
1
Which components belong to the FADEC system ?
Answer:
2
How many bearing compartments are installed ?
Answer:
3
What is the purpose of the ECU Alternator ?
Answer:
4
What is the purpose of the fuel return valve ?
Answer:
For Training Purposes Only
A319 / A320 / A321
5
How can the fuel return valve be checked for leakage ?
Answer:
FRA Us-T Bu July 97
6
Are there any adjustments to be made on the HCU ?
Answer:
7
How is the Thrust Reverser actuated ?
Answer:
8
What is the purpose of the T-case signal ?
Answer:
9
Where is station 12 ?
Answer:
10
How can the Thrust reverser be deactivated ?
Answer:
Page: 292
© Lufthansa German Airlines
79-20
CFM 56-5A1 / 5A5
A320-21 1
For Training Purposes Only
LOW OIL
PRESSURE
SWITCH
13psi
OIL QTY TRANSM.
ORIFICE
OIL PRESSURE
TRANSMITTER
ANTI SIPHON
DEVICE
OIL TANK
MAIN
FUEL / OIL
HEAT EXCHANGER
FUEL
AFT
OIL SUMP
( BRG # 4, # 5 )
FWD OIL SUMP
( BRG # 1, # 2, # 3 )
TECHNICAL TRAINING
Lufthansa
MAG.PLUG
& SCREEN
SUPPLY FILTER
BYPASS VALVE
& CLOGGING IND.
COLD START PRESS
RELIEF VLV ( 305 psi )
SUPPLY
PUMP
SERVO FUEL
HEATER
FUEL
OIL SCAVENCE
FILTER
P SWITCH
( 25 PSI ECAM
” OIL FILTER
CLOG ” )
TEMP ENG
OIL ( TEO )
É
É
OIL TEMP.
SENSOR
( ECAM )
AGB
TGB
SCAVENCE
PUMP ( 4 )
SCAVENCE
SCREEN
WITH CHIP
DETECTOR
Engine Oil
Distribution
RADIAL DRIVE
SHAFT HOUSING
( RDS )
SCAVENGE
FILTER
LUBRICATION UNIT
ÁÁÁÁÁ
ÁÁÁÁÁ
Figure A
PUMP SUPPLY
ÉÉÉÉÉ
ÉÉÉÉÉ
PRESSURE OIL
Oil System Basic Schematic CFM 56 - 5A1 / 5A5
ÄÄÄÄ
ÄÄÄÄ
SCAVENGE OIL
ÅÅÅÅÅ
ÅÅÅÅÅ
VENT PRESSURE
1
© Lufthansa German Airlines
73-10
CFM 56-5A1 / 5A5
A320 / 319
For Training Purposes Only
HEAT EXCHANGER
FLSCU
SERVO FUEL
HEATER
MAIN OIL / FUEL
HMU
OIL OUT
ENGINE OIL
TEMPERATURE
( TEO )
RACC ACTUATOR
LVDT 2ea
RACC
TM / SV
OIL
IN
ECU
LPTACC ACTUATOR
LVDT 2ea
LPTACC
TM / SV
TECHNICAL TRAINING
Lufthansa
VSV
TM / SV
A
I
R
C
R
A
F
T
FUEL
LP VALVE
MAIN
PUMP
FUEL
FILTER
BP
VLV
FUEL FILTER
P SWITCH
( 11 psi ECAM
” FUEL FILTER
CLOG ” )
BSV
SOLENOID
LP PUMP
FMV
TM / SV
OFF
T
A
N
K
S
ENG
1
FUEL NOZZLES
( 2 MANIFOLDS,
EACH WITH
10 NOZZLES )
VBV MOTOR
RVDT
VBV
TM / SV
WASH
FILTER
ON
HPTACC ACTUATOR
LVDT 2ea
HPTACC
TM / SV
HP
PUMP
FIRE
PUSH
VSV ACTUATORS
EACH WITH 1 LVDT
FUEL
METERING
VALVE
RVDT 2ea
PRESSURIZING
AND SHUTOFF
VALVE
POS SW 2ea
BURNER
STAGING
VALVE
POS SW 2ea
FUEL FLOW
TRANSMITTER
A / C ISOLATION
VALVE
BYPASS
VALVE
FUEL
RETURN
VALVE
Engine Fuel and Control
Distribution
RETURNS
FROM SERVOS
IDG OIL
COOLER
A / C PRESSURE
HOLDING VALVE
MAIN STREAM
Figure B
SHUTOFF
SOLENOID
Fuel System Schematic CFM 56 - 5A1 / 5A5
IDG
OIL
FUEL RETURN VALVE
OPEN PRESSURE
HMU BYPASS
FUEL RETURN VALVE
SHUTOFF SIGNAL
FROM HP FUEL
SHUTOFF VALVE
HOT RETURN
COLD RETURN
1
© Lufthansa German Airlines
For Training Purposes Only
73-20
CFM56-5A1
A320-21 1
ENG
EIU 2 >
< EIU 1
< FADEC 1A
FADEC 1B >
< FADEC 2A
FADEC 2B >
< EVMU
< RETURN
EIU 2
< LAST LEG REPORT
< PREVIOUS LEG REPORT
EIU 2
< LRU IDENT
LAST LEG REPORT
DATE: APR.15
< CLASS 3 FAULTS
TECHNICAL TRAINING
Lufthansa
GMT
ATA
CHECK ECU2 A1 AND B1 BUS OR EIU2
RTOK
1026
73-25-34
< GROUND SCANNING
< RETURN
PRINT >
CHECK 27809GJ RELAY CIRCUIT OR EIU 2
( 2 TIMES )
RTOK
1320
73-25-34
< RETURN
PRINT >
EIU 2
GROUND SCANNING
DATE: APR.15
GMT
ATA
CHECK ECU2 A1 AND B1 BUS OR EIU2
1026
73-25-34
EIU 2
PREVIOUS LEGS REPORT
CHECK 27809GJ RELAY CIRCUIT OR EIU 2
( 2 TIMES )
RTOK
1320
73-25-34
D-AIQA
LEG
DATE
GMT
< RETURN
ATA
PRINT >
CHECK OIL QTY XMTR 2 CIRCUIT 4002EN
-06
0304
1000
< RETURN
79-31-15
PRINT >
EIU 2
EIU 2
Engine
EIU CFDS Test
LRU IDENTIFICATION
CLASS 3 FAULTS
NO FAILURE
39579 - 006 - 11
< RETURN
Figure C
CFDS EIU Menu
PRINT >
< RETURN
PRINT >
1
© Lufthansa German Airlines
73-20
CFM56-5A1
A320-21 1
For Training Purposes Only
NOTE:
FADEC PWR MUST BE SWITCHED ”ON”
OTHERWISE ”NO RESPONSE” IS
DISPLAYED.
ENG
EIU 2 >
< EIU 1
FADEC GND PWR P/B
< FADEC 1A
FADEC 1B >
< FADEC 2A
FADEC 2B >
< EVMU
LAST LEG REPORT
ENGINE 1 CHANNEL A
ENGINE 1 CHANNEL A
TECHNICAL TRAINING
Lufthansa
GMT
ATA
IGN 1 , ECU
2216
742138
DIR VLV , J5 , ECU
2131
783152
EOT SNSR, J13, ECU
2100
793140
PREVIOUS LEGS REPORT
2114
732534
TCC SENS , J13 , ECU
-02
2304
2131
732170
LPTC VLV, HMU
-03
2404
733152
1606
< RETURN
PRINT >
ENGINE 1 CHANNEL A
PRINT >
< RETURN
SCHED. MAINT.REP. >
TROUBLE SHOOTING REPORT
ENGINE 1 CHANNEL A
DATE
GMT
ATA
EIU, J3
-02
2304
FADEC TEST >
< TROUBLE SHOOTING
REPORT
< CLASS 3 FAULTS
REPORT
PRINT >
< RETURN
T/R TEST >
< LRU IDENT
< RETURN
LEG
IGN TEST >
< LAST LEG
REPORT
< PREVIOUS LEG
REPORT
PRINT >
< RETURN
NEXT PAGE
TROUBLE SHOOTING REPORT
Engine
FADEC CFDS Menu
LRU IDENTIFICATION
ENGINE 1 CHANNEL A
ATA
LRU PART NO.
732160
ECU 1519M83P04
ENGINE 1 CHANNEL A
CLASS 3 FAULTS
ENGINE 1 CHANNEL A
DATE
ATA
J3, ADC1
1606
715100
IDENT PLUG DATA
ENGINE FAMILY 1
BUMP STATUS 0
PMUX INSTALLED Y
ENGINE S/N 263100
TR SHUTOFF VALVE (Y / N)
YES
PRINT >
< RETURN
Figure D
FADEC CFDS Menu
< RETURN
PRINT >
< RETURN
PRINT >
1
© Lufthansa German Airlines
For Training Purposes Only
FADEC TEST
73-20
CFM56-5A1
A320-21 1
ENGINE 1 CHANNEL A
< LAST LEG
REPORT
IGN TEST >
< PREVIOUS LEG
REPORT
T/R TEST >
WITHOUT DUCT PRESS
FADEC TEST
ENGINE 1 CHANNEL A
FADEC TEST >
< LRU IDENT
< TROUBLE SHOOTING
REPORT
******* * *** WARNING ***********
********* TEST ACTIVE********
< CLASS 3 FAULTS
REPORT
< RETURN
PRINT >
PRESS RETURN TO ABORT
WITH DUCT PRESS
< RETURN
FADEC TEST
FADEC TEST
ENGINE 1 CHANNEL A
ENGINE 1 CHANNEL A
FOR ENGINE MOTORING TEST
SUPPLY STARTER AIR.
OTHERWISE A NON - MOTORING
TEST WILL BE PERFORMED
TECHNICAL TRAINING
Lufthansa
PUSH BUTTON TO
START THE TEST >
*********** WARNING ***********
*********TEST ACTIVE********
FADEC TEST
ENGINE 1 CHANNEL A
A NON - MOTORING TEST WAS
PERFORMED DUE TO
INSUFFICIENT STARTER AIR
PRESSURE OR DUE TO A STARTER
AIR VALVE FAILURE
PRESS RETURN TO ABORT
< RETURN
< RETURN
DISPLAY NON-MOTORING >
TEST RESULT
< RETURN
FADEC TEST REPORT
FADEC TEST
ENGINE 1 CHANNEL A
ENGINE 1 CHANNEL A
LEG
PUT MODE SELECTOR
SWITCH TO <NORM>
PLACE THE MASTER LEVER
SWITCH TO <ON>
LEG
PRESS RETURN TO ABORT
HMU, J7
00
2304
FADEC TEST REPORT
ENGINE 1 CHANNEL A
DATE
GMT
GMT
ATA
733152
ATA
2114
732110
DIR VLV , J6 , ECU
00
2304
2131
783152
< RETURN
< RETURN
< RETURN
PRINT >
PRINT >
**** TEST COMPLETE ****
MASTER 1
ON
DATE
LPTC VLV , HMU
00
0606
0206
**** TEST COMPLETE ****
ENG
ENGINE 1 CHANNEL A
ENGINE 1 CHANNEL A
1
PLACE THE MASTER LEVER
OFF
PLACE THE MASTER LEVER
SWITCH TO <OFF>
Engine
FADEC Test
SWITCH TO <OFF>
< RETURN
< RETURN
Figure E
FADEC Test
1
© Lufthansa German Airlines
73-20
CFM56-5A1
A320-21 1
For Training Purposes Only
FADEC TEST
ENGINE 1 CHANNEL A
< LAST LEG
REPORT
IGN TEST >
< PREVIOUS LEG
REPORT
T/R TEST >
FADEC TEST >
< LRU IDENT
IGNITION TEST
< TROUBLE SHOOTING
REPORT
ENGINE 1 CHANNEL A
< CLASS 3 FAULTS
REPORT
MASTER 1
< RETURN
PRINT >
PUT THE MODE SELECTOR
SWITCH TO < NORM >
PLACE THE MASTER LEVER
TO THE < ON > POSITION
ON
ENG
1
OFF
PUSH BUTTON TO
START THE TEST >
TECHNICAL TRAINING
Lufthansa
< RETURN
IGNITION TEST
ENGINE 1 CHANNEL A
******* WARNING * *****
***** TEST ACTIVE ******
IGNITERS 1 AND 2 WILL
CYCLE ONCE FOR 10 SECS
PRESS RETURN TO ABORT
< RETURN
*******
TEST COMPLETE ******
ENGINE 1 CHANNEL A
PLACE THE MASTER LEVER
Engine
CFDS Ignition Test
SWITCH TO < OFF >
< RETURN
Figure F
CFDS Ignition Test
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
THE GROUND CREW MUST CONFIRM AT THE
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ENGINE THAT THE IGNITION IS WORKING.
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇ
1
© Lufthansa German Airlines
For Training Purposes Only
73-20
CFM56-5A1
A320-21 1
INST.
<FWC 1
CFDIU >
<FWC 2
EIS 1 >
<FDIU
EIS 2>
<WBS 1
EIS 3>
<WBS 2
DMU >
EIS1 (DMC1)
ENGINES OVER SPD / TEMP.
N1 RED LINE = 102.0%
< RETURN
N1E2 = NO OVERSPEED
< RETURN
EIS1 (DMC1)
PRINT >
< LAST LEG REPORT
< PREVIOUS LEG REPORT
< LRU IDENT
TEST >
< ENGINES
TECHNICAL TRAINING
Lufthansa
< DUMP BITE MEMORY
< RETURN
PRINT >
EIS1 (DMC1)
ENGINES OVER SPD / TEMP.
N2 RED LINE = 105.0%
N2E2 = NO OVERSPEED
EIS1 (DMC1)
ENGINES OVER SPD / TEMP.
< RETURN
< N1E1
N1E2 >
<N2E1
N2E2 >
<EGTE1
PRINT >
OR
EGTE2 >
< GENERAL RESET
< RETURN
PRINT >
EIS1 (DMC1)
EIS1 (DMC1)
ENGINES OVER SPD / TEMP.
EGT RED LINE = 890.0 DEG. C.
ENGINES OVER SPD / TEMP.
Engine
EIS CFDS Menu
EIS1 (DMC1)
ENGINES OVER SPD / TEMP.
EGT E2 MAX REACHED = 942.5 DEG. C.
GENERAL RESET
EGT RED LINE = 890.0 DEG. C.
EGT E2 = NO OVERTEMP.
RESET CLOSED
< RETURN
< RETURN
Figure G
PRINT >
CFDS EIS Menu/Max Pointer Reset
PRINT >
< RETURN
PRINT >
1
© Lufthansa German Airlines
For Training Purposes Only
73-20
CFM56-5A1
A320-21 1
ENG
EIU 2 >
< EIU 1
< FADEC 1A
FADEC 1B >
< FADEC 2A
FADEC 2B >
NEXT
PAGE
< EVMU
EVMU
< RETURN
< INITIAL
<ACCELEROMETER RECONFIGURATION
EVMU
< ENGINE UNBALANCE
< LAST LEG REPORT
< FREQUENCY ANALYSIS
< PREVIOUS LEG REPORT
EVMU
< LRU IDENT
LAST LEG REPORT
DATE: APR.15
TECHNICAL TRAINING
< RETURN
< CLASS 3 FAULTS
GMT
ATA
ENG 1 BEARING 1 ACCLMR
1026
77-32-16
Lufthansa
VALUES
PRINT >
< TEST
< RETURN
< RETURN
PRINT >
PRINT >
EVMU
TEST
DATE: APR.15
GMT
ATA
ENG 1 BEARING 1 ACCLMR
EIU 2
1026
77-32-16
PREVIOUS LEGS REPORT
D-AIQA
LEG
DATE
GMT
< RETURN
ATA
PRINT >
EVMU
-06
0304
1000
< RETURN
77-32-34
PRINT >
EVMU
EVMU
Engine
EVMU CFDS Menu
LRU IDENTIFICATION
CLASS 3 FAULTS
P/N 241-191-550-021
< RETURN
Figure H
CFDS EVMU Menu
NO FAILURE
PRINT >
< RETURN
PRINT >
1
© Lufthansa German Airlines
For Training Purposes Only
73-20
A319 /A320 / A321
CFM56-5A1
NEXT
PAGE
ACCELEROMETER RECONFIGURATION
ACCELEROMETER RECONFIGURATION
< LEFT
BEAR 1
EVMU
EVMU
EVMU
< INITIAL
RIGHT >
BEAR 1
ENGINE
< LEFT
ACC 2
( TRF )
<ACCELEROMETER RECONFIGURATION
RIGHT >
BEAR 1
ENGINE
VALUES
< ENGINE UNBALANCE
< FREQUENCY ANALYSIS
< RETURN
PRINT >
< RETURN
EVMU
EVMU
BALANCING LEFT
TECHNICAL TRAINING
Lufthansa
< RETURN
PRINT >
EVMU
BALANCING LEFT
ENGINE UNBALANCE
<BEAR1
START
TRF>
<BEAR1
START
TRF>
20 / 59
N1/N2%
20 / 59
00 / 00
N1/N2%
00 / 00
< LEFT
READ
RIGHT >
359
0 / 359
PHASE DEG
359
0 / 359
0
0/0
PHASE DEG
0
0/0
< LEFT
LOAD
RIGHT >
0.1
0.1 / 0.1
DISPL MILS
0.0
0.0 / 0.1
0.0
0.0 / 0.0
DISPL MILS
0.0
0.0 / 0.0
< LEFT
BALANCING
RIGHT >
<BEAR1
STOP
* TRF>
<BEAR1 *
STOP
TRF>
< RETURN
FREQUENCY ANALYSIS
FREQUENCY ANALYSIS
FREQUENCY ANALYSIS
PRINT >
EVMU
EVMU
EVMU
REQUEST OFF FOR N 2
REQUEST OFF FOR N 1
< LEFT N 1
% RPM / FLIGHT PHASE
% RPM / FLIGHT PHASE
< LEFT
< RETURN
Figure I
PRINT >
CFDS EVMU Menu
< RETURN
LOAD
PRINT >
< RETURN
N 1 RIGHT >
N 2 RIGHT >
< LEFT N2
< N/A / 6
< N/A / 6
Engine
EVMU CFDS Menu
PRINT >
CANCEL
RIGHT >
PRINT >
1
© Lufthansa German Airlines
For Training Purposes Only
79-30
CFM56-5A1
A320-21 1
AL
CR
”A”
AL
ECU
.
”B”
CR
.
TEMP.ENG.OIL
TO AIRCRAFT
SYSTEMS:
(STEERING)
(TIPIS)
(DOOR WARN)
(FWC)
(FAC)
(FMGC)
(IDG CONTR.)
<13PSI
>16PSI
LOP SWITCH
.
.
.
MASTER
WARN
20
MASTER
CAUTION
20
20
100
100
NAC
c
20
ENGINE PAGE
.
HORN
TECHNICAL TRAINING
Lufthansa
LOP RELAY
FWC1
28VDC
ENG1(2)
OIL
PRESS
(121VU)
FWC2
OIL PRESS. XMTR
EIU1(2)
OIL SCAV. FILTER DIFF.
PRESS.SW.
SDAC1
POWER SUPPLY
Oil Indicating System
Basic Schematic
CRUISE PAGE
SDAC2
ENG OIL TEMP SENSOR
28V DC
ENG1(2)
OIL
QTY
(121VU)
DMC
(1,2,3)
SIGNAL
CONDITIONED
ENG 1 (2) OIL FILTER CLOG
- THR LEVER 1 (2) BELOW WARN
- IF WARN AT IDLE AFTER 3MN ON
- ENG MASTER 1 (2) .........OFF
ENG 1 (2) OIL LO TEMP
- AVOID HI POWER
OIL QTY. XMTR
Figure J
ENG 1 (2) OIL LOPR
- THR LEVER 1 (2).....IDLE
-ENG MASTER1 (2)...OFF
ENG 1 (2) OIL TEMP HI
- THR LEVER 1 (2) BELOW
WARN
- ENG MASTER 1 (2) OFF
Oil Indicating Schematic
E/WD
1
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