Garmin | GWX™ 68 | Garmin GWX™ 68 STC SA01670SE GWX 68/C90 Weather Radar ICA

Garmin GWX™ 68 STC SA01670SE GWX 68/C90 Weather Radar ICA
GWX 68 Weather Radar
Instructions for Continued Airworthiness
FAA STC Project No. ST9355SE-A
Document Number 190-00286-04 Rev. B
Date 3/7/06
Garmin Ltd. Or its subsidiaries
c/o Garmin International, Inc.
1200 E. 151st Street
Olathe, Kansas 66062 USA
COMPANY PROPRIETARY
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 1 of 10
COMPANY PROPRIETARY INFORMATION
This drawing and the specifications contained herein are the property of Garmin Ltd. or its subsidiaries
and may not be reproduced or used in whole or in part as the basis for manufacture or sale of products
without written permission.
Copyright ¤ 2006 Garmin Ltd. or its subsidiaries. All rights reserved.
Garmin Ltd. or its subsidiaries
c/o Garmin International, Inc.
st
1200 E. 151 Street
Olathe, Kansas 66062 U.S.A
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 2 of 10
1. INTRODUCTION................................................................................................................... 4
1.1 PURPOSE ............................................................................................................ 4
1.2 Scope.................................................................................................................... 4
1.3 Document Revision............................................................................................... 4
1.4 Document Distribution .......................................................................................... 4
1.5 Airworthiness Limitations Section ......................................................................... 4
1.6 Permission to Use Certain Documents................................................................. 4
1.7 Definitions ............................................................................................................. 4
1.8 Reference Documents .......................................................................................... 5
2. SAFETY INFORMATION...................................................................................................... 5
2.1 General Precautions ............................................................................................. 6
2.2 Body Damage ....................................................................................................... 6
2.3 Safe Distance Determination ................................................................................ 6
2.4 Combustible Materials .......................................................................................... 6
3. INSTRUCTIONS FOR CONTINUED AIRWORTHINESS .................................................... 7
3.1 Introduction ........................................................................................................... 7
3.2 Description of Alteration........................................................................................ 7
3.3 Control, Operating Information ............................................................................. 7
3.4 Servicing Information ............................................................................................ 7
3.5 Periodic Maintenance Instructions........................................................................ 8
3.6 Troubleshooting Information ................................................................................. 8
3.7 Removal and Replacement Information ............................................................... 8
3.8 Diagrams............................................................................................................... 8
3.9 Special Inspection Requirements ......................................................................... 8
3.10 Servicing Information ............................................................................................ 9
3.11 Application of Protective Treatments.................................................................... 9
3.12 Data Relative to Structural Fasteners................................................................... 9
3.13 Special Tools ........................................................................................................ 9
3.14 Additional Instructions........................................................................................... 9
3.15 Overhaul Period .................................................................................................... 9
3.16 Revision ................................................................................................................ 9
3.17 Assistance............................................................................................................. 9
3.18 Implementation and Record Keeping ................................................................... 10
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 3 of 10
1. INTRODUCTION
1.1
PURPOSE
This document is designed for use by the installing agency of the GWX 68 Weather Radar as
Instructions for Continued Airworthiness in response to Federal Aviation regulation (FAR) Part 23.1529,
and Part 23 Appendix G. They include information required by the operator to adequately maintain the
GWX 68.
1.2
Scope
This document identifies the Instruction for Continued Airworthiness for the modification of the aircraft for
installation of the Garmin GWX 68 Weather Radar. It applies to aircraft altered by installation of the
Garmin GWX 68 Weather Radar system.
1.3
Document Revision
This document shall be released, archived, and controlled in accordance with Garmin document control
system. As such when this and other documents are revised, the entire document is revised and the
new revision nomenclature is changed on each page of the revised document. Changes to this
document require FAA approval prior to release.
1.4
Document Distribution
This document, or the information contained within, will be retained in the aircraft’s permanent records.
The latest revision of this document will be available on the Garmin website (garmin.com). A Garmin
Service Letter, describing the ICA revision, will be sent to dealers and GWX 68 Weather Radar owners
of record if revision is determined to be significant. Each revision will be approved as described in
Section 3.16 of this document.
1.5
Airworthiness Limitations Section
There are no additional Airworthiness Limitations as defined in 14 CFR § 23, Appendix G. that result
from this modification. The Airworthiness Limitations section is FAA approved and specifies maintenance
required under §43.16 and §91.403 of the Federal Aviation Regulations unless an alternative program
has been FAA approved.
1.6
Permission to Use Certain Documents
Permission is granted to any corporation or person applying for approval of a Garmin GWX 68 Weather
Radar to use and reference appropriate STC documents to accomplish the Instructions for Continued
Airworthiness and show compliance with STC engineering data. This permission does not construe
suitability of the documents. It is the responsibility of the applicant to determine the suitability of the
documents for the ICA.
1.7
Definitions
The following terminology is used within this document:
1) AC: Advisory Circular
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 4 of 10
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
1.8
ACO: Aircraft Certification Office
AEG: Aircraft Evaluation Group
CFR: Code of Federal Regulations
DER: Designated Engineering Representative
FAA: Federal Aviation Administration
IAW: In Accordance With
ICA: Instructions for Continued Airworthiness
MFD: Multi-Function Display unit
PMI: Primary Manufacturing Inspector
POI: Primary Operations Inspector
STC: Supplemental Type Certificate
TC: Type Certification or Type Certificate
TSO: Technical Standard Order
Reference Documents
1.8.1 Garmin
1) 190-00286-01, GWX 68 Weather Radar Installation Manual
2) 005-C0171-00, GWX 68 Weather Radar Master Data List
3) 560-1025-09, MX20 Multifunction Display Installation Manual
2. SAFETY INFORMATION
WARNING
This radar device produces microwave radiation.
DO NOT OPERATE THIS DEVICE UNTIL ALL SAFETY
PRECAUTIONS AND INSTRUCTIONS IN THE
OPERATING AND INSTALL MANUALS HAVE BEEN
READ.
IMPROPER USE OR EXPOSURE MAY RESULT IN
BODILY INJURY.
CAUTION
All personnel should remain the prescribed “safe distance”
from this radar.
Never expose any part of the body to an unterminated
waveguide.
Information derived from AC 20-68B:
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 5 of 10
2.1
General Precautions
Airborne weather radar should be operated on the ground only by qualified personnel.
Installed airborne radar should not be operated while the aircraft is in a hanger or other enclosure unless
the radar transmitter is not operating, or the energy is directed toward an absorption shield which
dissipates the radio frequency energy. Otherwise, radiation within the enclosure can be reflected
throughout the area.
2.2
Body Damage
To prevent possible human body damage, the following precautions should be taken, personnel should
never stand nearby and in front of a radar antenna which is transmitting. When the antenna is not
scanning, the danger increases.
2.3
Safe Distance Determination
The recommended minimum safe distance for personnel form an operating GWX 68 weather radar is
12 feet (this covers both 12 inch and 10 inch models) as indicated in the illustration below. All personnel
must remain outside of this zone. The distance to the Maximum Exposure Level (MPEL) boundary is
calculated upon the basis of each antenna available with the GWX 68 system, rated output power of the
transmitter, and in the non-rotating or boresight position of the antenna. This recommendation slightly
exceeds calculation methods defined in AC 20-68B. Refer to this AC for additional information on safe
distance determination.
MPEL
Boundary
12 ft
Center Line of
Aircraft
Radome
Antenna
2.4
Combustible Materials
To prevent possible fuel ignition, an installed airborne weather radar should not be operated while an
aircraft is being refueled or defueled.
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 6 of 10
3. INSTRUCTIONS FOR CONTINUED AIRWORTHINESS
3.1
Introduction
Content, Scope, Purpose and Arrangement:
This document identifies the Instruction for
Continued Airworthiness for the modification of the
aircraft by installation of the Garmin GWX 68
Weather Radar.
Applicability:
Applies to aircraft altered by installation of the
Garmin GWX 68 Weather Radar.
Definition of Abbreviations:
See Section 1.7
Precautions:
See Section 2, Safety Information
Units of measurement:
As stated by individual drawings.
Referenced publications:
190-00286-01 Rev C, GWX 68 Weather Radar
Installation Manual
(or later FAA approved revisions)
560-1025-09 Rev D, MX20 Multifunction Display
Installation Manual
Distribution:
3.2
This document should be included in the
permanent aircraft records.
Description of Alteration
The Garmin GWX 68 is installed in the aircraft as a remote-mount unit. Pilot control of the GWX 68 is
typically through the interfaced Garmin MX20 multifunction display unit, for display and control.
3.3
Control, Operating Information
The GWX 68 does not have a direct pilot interface. The GWX 68 is controlled via separately installed
display / control device, such as Garmin MX20 multi-function display, or similar display / control unit.
To validate the operation of the GWX 68, monitor the multi-function display weather depiction page and
look for display of weather data. See applicable MX20 Installation Manual listed under reference
documentation in paragraph 3.1 of this document for detailed information.
3.4
Servicing Information
None. In the event of system failure, return the unit to the manufacturer or an approved Garmin repair
station.
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 7 of 10
3.5
Periodic Maintenance Instructions
The GWX 68 Weather Radar unit operation is on condition. At each aircraft annual inspection, conduct a
visual inspection on the GWX 68 to insure continued installation integrity. Visually inspect wiring
harness to insure no chafing or wire routing problems. Check for integrity of shield grounds on ARINC
453 and ARINC 429 cables. The GWX 68 is located behind the Radome. To expose the GWX 68
Weather Radar RT unit, remove the screws holding the Radome per aircraft manufacturers instructions.
3.6
Troubleshooting Information
If weather radar information is not available on the MX20 control display unit, consult the
Troubleshooting section contained in the MX20 Installation Manual, listed under reference
documentation in paragraph 3.1 of this document.
3.7
Removal and Replacement Information
The GWX 68 is located behind the Radome. To expose the GWX 68 Weather Radar RT unit, remove the
screws holding the Radome per aircraft manufacturers instructions. Be careful not to scratch or damage
the Radome. To remove the GWX 68 Weather Radar RT unit, first remove the connector on top of the
unit, then remove the four mounting bolts. Note shims or washers behind each mounting bolt location.
When reinstalling the GWX 68, place the same shims or washers in the same location, install the bolts,
and then the connector.
If the GWX 68 unit is removed and reinstalled, verify GWX 68 unit operation after reinstallation. And, if
any work has been done on the aircraft that could affect the system wiring or any interconnected
equipment, verify the GWX 68 unit operation.
To verify the operation of the GWX 68, monitor the multi-function display weather depiction page and
look for display of weather data. Refer to the MX20 Installation Manual (listed under reference
documentation in paragraph 3.1 of this document) section Ground Based Checkout Procedure to verify
operation.
The unit must be checked for clearance in all extreme positions.
The wiring harness must be routed and secured in such a way that it can not be struck by or interfere
with unit movement throughout the full range of sweep and tilt.
Special care must be exercised to avoid any contact between any tools that can become magnetized
and the magnetron. Even momentary contact of a potentially magnetic object with the magnetron case
will cause serious weakening of the magnetic field. Use of non-magnetic tools (typically beryllium copper
or titanium) is recommended when installing or servicing the GWX 68.
3.8
Diagrams
Refer to the GWX 68 Installation Manual (listed under reference documentation in section 3.1 of this
document) for drawings applicable to this installation.
3.9
Special Inspection Requirements
None.
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 8 of 10
3.10 Servicing Information
None. In the event of system failure, return the unit to the manufacturer or an approved Garmin repair
station.
3.11 Application of Protective Treatments
None.
3.12 Data Relative to Structural Fasteners
Torque fasteners per GWX 68 Installation manual listed under reference documentation in paragraph 3.1
of this document. When unit is reinstalled in aircraft, use new locking nuts (if applicable).
3.13 Special Tools
No special tools are required for system checkout. Special tools are recommended for installation, see
Section 3.7 of this document.
3.14 Additional Instructions
The GWX 68 must be mounted to within 1° of level in both the vertical and horizontal planes, with the
aircraft in it’s level-flight orientation. The GWX 68 unit will typically be installed with AN960-416 washers
(quantity; As Required) under the base at the mounting bolts, to true the radar to the aircraft axis. Make
note of these washers at time of removal, and reinstall them in their original position when the GWX 68 is
reinstalled to the aircraft.
If necessary to re-shim the radar, a general rule of thumb is; One AN960-416 washer difference between
the top and bottom mounting bolts will typically correct ½ ° of tilt. Two washers will generally correct 1°,
etc.
3.15 Overhaul Period
The system does not require overhaul at a specific time period. Non operation of the unit may indicate
failure of the unit and the unit may require replacement. See troubleshooting section contained in the
GWX 68 Installation Manual, listed under reference documentation in paragraph 3.1 of this document.
3.16 Revision
To revise this ICA, a letter must be submitted to the ACO for approval along with the revised ICA. The
ACO will obtain AEG acceptance, and issue an approval letter for the revised ICA. After ACO approval,
Garmin will release the revised ICA for customer use, and provide any required notification of the
revision.
3.17 Assistance
Flight Standards Inspectors or the certificate holder’s PMI have the required resources to respond to
questions regarding this ICA. In addition, the customer may refer questions regarding this equipment and
its installation to the manufacturer, Garmin International. Garmin International customer assistance may
be contacted during normal business hours via telephone 913-397-8200 or email from the Garmin web
site at garmin.com.
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 9 of 10
3.18 Implementation and Record Keeping
For operators under FAR 91, the owner/operator is responsible for ensuring the ICA is made part of the
applicable §91.409 inspection program for their aircraft.
For operators under FAR 121/135, this ICA must be incorporated into the operator’s approved
maintenance program through coordination and approval with the certificate holder’s PMI/POI as
applicable.
GWX 68 Weather Radar
Instructions for Continued Airworthiness
190-00286-04 Rev. B
Page 10 of 10
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