TM-1-1520-228-CL
*TM 1-1520-228-CL
OPERATOR’S AND CREWMEMBER’S
CHECKLIST
OH-58A/C HELICOPTER
10 May 2006
DISTRIBUTION STATEMENTS A: Approved for
public release; distribution is unlimited.
* This manual supersedes TM 1-1520-228-CL,
29 July 2005.
HELICOPTER AND SYSTEMS
BEFORE EXTERIOR CHECK
1. Publications – Check.
2. Covers, locking devices, tiedowns (except main rotor),
and grounding cables – Removed and secured.
3. Ignition Switch – On.
4. Cockpit – Check.
EXTERIOR CHECK
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Cabin interior – Check.
Fuselage (Area 1) – Check.
Tailboom (Area 2) – Check, tiedown removed.
Main rotor blade (Area 2) – Check, tiedown removed.
Tail rotor gear box – Check.
Tail rotor – Check.
Tailboom (Area 3) – Check.
Fuselage (Area 4) – Check.
Main rotor blade (Area 4) – Check.
Fuselage top – Check.
Main rotor system – Check.
Fuselage (Area 5) – Check.
Cockpit – Check.
Fuselage (Area 6) – Check.
Crew and passenger briefing – Complete.
BEFORE STARTING ENGINES
1. Shoulder harness lock(s) – Check.
2. Overhead switches and circuit breakers – Set.
3. GPU – Connect for GPU – start.
4. Avionics – Off and set.
5. Instrument panel instruments & switches – Check and set.
6. Flight controls – Check and set.
7. Throttle – Check. Move to open, then to idle stop; press
rrrrrrrrridle release and close.
STARTING ENGINE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Fireguard – Post if available.
Rotor Blades – Check clear and untied.
Engine – Start.
GPU – Disconnect; then BAT switch – BAT, if required.
N2 – Stabilized.
THROTTLE ADJUST – 70 percent N1.
GEN switch – GEN.
DC amps – check 60 or less.
INV switch – INV.
Avionics – On.
ENGINE RUNUP
1. Engine and transmission instruments – Check.
2. Throttle – Slowly increase to open. Set N2 to 100 percent.
3. HEAT and DEICE systems – Check if use is anticipated;
rrrrrrrrthen set as required.
4. Avionics – Check as required.
5. Flight Instruments – Check and set.
6. Doors, armor side panels, and seat belts – Secure.
7. Health Indicator Test (HIT) – Check.
8. Deceleration check – Perform if required.
BEFORE TAKEOFF
1. N2 – 100 percent.
2. Systems – Check.
3. Crew, passengers, mission equipment, and seat belts –
rrrrrrrrCheck.
4. Avionics – As required.
HOVER CHECK
1.
2.
3.
4.
Flight controls – Check.
Engine and transmission instruments – Check.
Flight instruments – Check as required.
Power – Check.
BEFORE LANDING
1. Crew, passenger, and mission equipment – Check.
2. Landing light – As required.
Throttle – Engine idle: stabilize TOT for two minutes.
FORCE TRIM switch – FORCE TRIM.
FUEL BOOST switch – OFF.
NGV/LDG LTS – OFF.
Control frictions – On.
Avionics – OFF.
Overhead switches and circuit breakers – Set.
Battery charge – Check.
Throttle – Close.
Overhead switches – OFF as required.
Ignition switches – OFF (Keys as required).
Doors – Close immediately after exiting.
BEFORE LEAVING THE HELICOPTER
1.
2.
3.
4.
BEFORE STARTING ENGINE
1. ANTI COLL LTS switch – As required.
2. POS LTS switch – As required.
3. BAT switch – As required.
4. GPU – Connect for GPU start.
5. Flight control – Check and set.
6. Throttle – Check. Move to open, then to idle stop; press
rrrrrrrrridle release and close.
STARTING ENGINE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Fireguard – Post if available.
Rotor Blades – Check clear and untied.
Engine – Start.
GPU – Disconnect; then BAT switch – BAT, if required.
N2 – Stabilized.
THROTTLE ADJUST – 70 percent N1.
GEN switch – GEN.
DC amps – Check 60 or less.
INV switch – INV.
Avionics – On.
ENGINE RUNUP
ENGINE SHUTDOWN
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
O12.
12. Engine Oil Level – Check.
13. Main rotor system – Check condition.
14. Crew and passenger briefing – Complete.
1.
2.
3.
4.
Engine and transmission instruments – Check.
Throttle – Slowly increase to open. Set N2 to 100 percent.
Flight instruments – Check and set.
Doors, armor side panels; and seat belts – Secure.
BEFORE TAKEOFF
1. N2 – 100 percent.
2. Systems – Check.
3. Crew, passengers, mission equipment, and seat belts –
rrrrrrrrCheck.
4. Avionics – As required.
By Order of the Secretary of the Army:
Main rotor blades – Tie down as required.
Walk-around – Complete.
DA Form 2408-12 and 2408-13-1 – Complete.
Secure helicopter – As required.
PETER J. SCHOOMAKER
General, United States Army
Chief of Staff
THRU-FLIGHT CHECKLIST
PREFLIGHT
1. Covers, locking devices, tiedowns (except main rotor), and
rrrrrrrrrgrounding cables – Removed and secured.
2. Ignition switch – On.
O 3. Cargo/loose equipment – Check.
O 4. Auxiliary fuel cell – Check.
5. Passenger and seat belts – Check.
6. Hydraulic reservoirs/servos and flight controls – Check.
7. Transmission compartment – Check.
8. Fuel – Check quantity.
9. Main rotor blade – Check, tiedown removed.
10. Tail rotor gearbox – Check.
11. Tail rotor – Check.
1
Official:
JOYCE E MORROW
Administrative Assistance to the
Secretary of the Army
0612303
To be distributed in accordance with initial Distribution Number
(IDN) 310239, requirements for TM 1-1520-228-CL.
TM 1-1520-228-CL
EMERGENCY PROCEDURES
ENGINE MALFUNCTION
ENGINE FAILURE – HOVER
AUTOROTATE
ENGINE FAILURE – LOW ALTITUDE/LOW
AIRSPEED OR CRUISE
1. AUTOROTATE.
2. EMER SHUTDOWN.
ENGINE RESTART – DURING FLIGHT
1. Throttle – Close.
2. Attempt start.
3. LAND AS SOON AS POSSIBLE.
ENGINE COMPRESSOR STALL
1. Collective – Reduce.
2. ENG DEICE AND HTR switches – OFF.
3. LAND AS SOON AS POSSIBLE.
ENGINE OVERSPEED
1. Collective – Increase.
2. Throttle – Adjust.
3. LAND AS SOON AS POSSIBLE.
If RPM cannot be controlled manually:
4. AUTOROTATE.
When over a safe landing area, while simultaneously closing the
throttle.
5. EMER SHUTDOWN.
ENGINE UNDERSPEED
If powered flight with rotor in the green can be accomplished:
LAND AS SOON AS POSSIBLE.
If engine underspeed below 94% N2, then:
1. AUTOROTATE.
2. EMER SHUTDOWN.
ENGINE SURGES
If surges in engine RPM are experienced:
1. GOV RPM switch – INCR.
2. Throttle – Adjust to 98% N2.
3. LAND AS SOON AS POSSIBLE.
If engine surges are not controlled in steps 1 and 2 above:
4. AUTOROTATE.
5. EMER SHUTDOWN.
Accomplish during descent, if time permits.
ROTORS, TRANSMISSION, AND DRIVE
SYSTEMS MALFUNCTION
LOSS OF TAIL ROTOR EFFECTIVENESS (LTE)
1. Pedal – Full Left.
2. Cyclic – Forward.
3. As recovery is effected, adjust controls for normal flight.
MAIN DRIVESHAFT FAILURE
1. AUTOROTATE – Establish power on autorotational glide.
2. EMER SHUTDOWN after landing.
CLUTCH FAILS TO DISENGAGE
1. Throttle – Open.
2. LAND AS SOON AS POSSIBLE.
MAST BUMPING
LAND AS SOON AS POSSIBLE.
FIRE
HOT START
1. STARTER switch – Press.
Continue to press and hold until TOT is less than 200°C.
2. Throttle – Close.
ENGINE/FUSELAGE/ELECTRICAL FIRE - GROUND
EMER SHUTDOWN
ENGINE/FUSELAGE/FIRE-IN-FLIGHT
If Power-On landing:
1. LAND AS SOON AS POSSIBLE.
2. EMER SHUTDOWN after landing.
If Power – Off landing:
3. AUTOROTATE.
4. EMER SHUTDOWN.
ELECTRICAL FIRE – FLIGHT
1. BAT and GEN switches – OFF.
2. LAND AS SOON AS POSSIBLE.
3. EMER SHUTDOWN after landing.
2.
3.
4.
5.
Crew (except pilot) and passengers – Exit.
Hover at a safe distance away from personnel.
AUTOROTATE.
Pilot – Exit when the main rotor stops.
DITCHING – POWER OFF
1. AUTOROTATE.
2. Doors – Jettison.
3. Crew and passengers – Exit when the main rotor stops.
FLIGHT CONTROL MALFUNCTIONS
1. LAND AS SOON AS POSSIBLE.
2. EMER SHUTDOWN after landing.
LIGHTNING STRIKE
LAND AS SOON AS POSSIBLE
IN-FLIGHT WIRE STRIKE
LAND AS SOON AS POSSIBLE.
WARNING PANEL LIGHTS
WARNING LIGHT
CORRECTIVE ACTION
ROTOR RPM
Verify condition. Adjust collective.
MASTER CAUTION
ENGINE OUT
Check for Caution Panel
segment light illumination. If
none, LAND AS SOON AS
POSSIBLE.
Verify condition. AUTOROTATE.
XMSN OIL PRESS (Red)
LAND AS SOON AS POSSIBLE.
XMSN OIL HOT (Red)
LAND AS SOON AS POSSIBLE.
SMOKE AND FUME ELIMINATION
1. Vents – Open.
2. DEFOG & vent SWITCH – ON.
ELECTRICAL SYSTEM MALFUNCTIONS
GENERATOR FAILURE – NO OUTPUT
1. GEN FIELD and GEN & BUS RESET circuit breakers –
Check in.
2. GEN switch – RESET, then GEN – Do not hold the switch
in the RESET position.
If the generator is not restored, or if it goes off the line
again:
3. GEN switch – OFF.
4. Turn OFF all unnecessary electrical equipment.
5. LAND AS SOON AS PRACTICABLE.
OVERHEATED BATTERY
1. BAT switch – OFF.
2. LAND AS SOON AS POSSIBLE.
3. EMER SHUTDOWN after landing.
HYDRAULIC SYSTEM MALFUNCTION
HYDRAULIC POWER FAILURE
1. Airspeed – Adjust.
2. HYD BOOST SOL circuit breaker – Out.
If hydraulic power is not restored:
3. HYD BOOST SOL circuit breaker – in.
4. HYD BOOST switch – OFF.
5. LAND AS SOON AS PRACTICABLE.
LANDING AND DITCHING
DITCHING – POWER ON
CAUTION PANEL LIGHTS
CAUTION LIGHT
CORRECTIVE ACTION
FUEL BOOST
LAND AS SOON AS PRACTICABLE.
20 min fuel
LAND AS SOON AS PRACTICABLE.
FUEL FILTER
LAND AS SOON AS POSSIBLE.
ENG OIL BYPASS
LAND AS SOON AS POSSIBLE.
ENG CHIP DET
LAND AS SOON AS POSSIBLE.
XMSN CHIP DET
LAND AS SOON AS POSSIBLE.
T/R CHIP DET
LAND AS SOON AS POSSIBLE.
INST INVERTER
Information/System status.
DC GENERATOR
Refer to emergency procedures.
HYD PRESS
Refer to emergency procedures.
IFF
Information/System status.
SPARE
LAND AS SOON AS POSSIBLE.
PIN: 078043-000
1. Doors – Jettison at a hover.
2
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