737-300 400 500 AMM 飞机维护手册 导航 NAVIGATION 4(69)

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 8) Push the LSK adjacent to POS SHIFT>.
 9) Push the PREV PAGE key on the CDU.
 10) Make sure that the POS REF 2/3 page shows the position of
 GPS L and GPS R.

 S 864-018
 (5) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 GPS ANTENNA - REMOVAL/INSTALLATION
__________________________________
 1.  General
_______
 A.  This procedure has two tasks. The first task is the removal of a GPS antenna. The second task is the installation of a GPS antenna.
 B.  There are two GPS antennas on the airplane. The forward (left) antenna is installed at station 500A. The aft (right) antenna is installed at station 500B.
 TASK 34-58-21-024-001
 2.  GPS Antenna Removal (Fig. 401)
___________________
 A.  Equipment
 (1)  Sealant removal tool - hardwood or plastic
 B.  Access
 (1)  Location Zones
 107 Forward Half of Cabin, Right

 C.  Removal Procedure
 S 864-002
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  
On the electronic load circuit breaker panel P6: 1) GPS 1

 (b)  
On the electronic load circuit breaker panel P18: 1) GPS 2

 S 024-003
 (2)  Remove the GPS antenna:
 CAUTION: BE CAREFUL WHEN YOU USE THE SEALANT REMOVAL TOOL TO BREAK
_______ THE SEAL. TOO MUCH FORCE CAN CAUSE DAMAGE TO THE AIRPLANE SKIN, THE COAXIAL CABLE, OR THE ANTENNA.
 (a)  
Use the sealant removal tool to break the seal all around the antenna.

 (b)  
Remove the sealant that covers the antenna screws.

 (c)  
Remove the antenna screws.

 CAUTION: MOVE THE ANTENNA THE LEAST DISTANCE NECESSARY TO
_______ DISCONNECT THE CONNECTOR. DAMAGE TO THE CABLE CAN OCCUR IF YOU PULL THE CABLE WITH TOO MUCH FORCE.
 (d)  Carefully pull the antenna until you can get access to the connector.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
GPS ANTENNA NO. 1

ANTENNA

GPS ANTENNA

Global Positioning System Antenna Installation
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
F08900
A
737-300/400/500MAINTENANCE MANUAL
 (e)  Disconnect the connector.
 NOTE: Make sure the cable and connector do not fall into the
____ airplane fuselage.
 (f)  Remove the GPS antenna.
 TASK 34-58-21-424-004
 3. GPS Antenna Installation (Fig. 401).
________________________
 A. Equipment
 (1)  
Resistance measuring bridge or ohmmeter

 (2)  
Spatula - fillet smoothing tool, hardwood or plastic

 B. Consumable Materials
 (1)  
A00145 Sealant - BMS 5-95, Class B-2

 (2)  
B00184 Solvent - BMS 11-7

 (3)  
C00175 Primer - BMS 10-79, Type III

 (4)  
C00855 Alodine

 (5)  
D00294 Grease - BMS 3-24

 (6)  
G00009 Corrosion Preventive Compound - BMS 3-23

 (7)  
G00033 Woven Cheesecloth - BMS 15-5

 C. References
 (1)  
AMM 20-10-81/701, Metal Surfaces

 (2)  
AMM 24-22-00/201, Manual Control
　
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