S 764-010
(4)
Make sure the bonding resistance from the antenna base to the airplane skin is no larger than 0.001 ohms (SWPM 20-20-00).
S 394-011
(5)
Apply the weather-aerodynamic fillet seal between the antenna and the airplane surface to make the edge smooth (AMM 51-31-00/201).
S 164-021
(6)
Remove all unwanted sealant from arount the antenna base.
S 864-014
(7)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6-1 Circuit Breaker Panel
1) VHF-2
(b)
P18-2 Circuit Breaker Panel
1) VHF-1
2) VHF-3 (if installed)
F. VHF Communication Antenna Installation Test
S 864-022
(1)
Supply electrical power (AMM 24-22-00/201).
S 714-023
(2)
Tune in a different VHF station.
(a) Make sure the transmission and reception are satisfactory.
NOTE: This is not a full test of the VHF communication system.
____ If a full system functional test is necessary, do this task: VHF Communication System Adjustment/Test procedure (AMM 23-21-00/501), for airplanes with an ARINC 500 VHF systems installed. Refer to AMM 23-21-01/501 for airplanes with ARINC 700/900 VHF systems installed.
S 714-017
(3) Remove electrical power if it is no longer necessary
(AMM 24-22-00/201).
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A
737-300/400/500MAINTENANCE MANUAL
VHF COMMUNICATION TRANSCEIVER - REMOVAL/INSTALLATION
____________________________________________________
1. General_______
A. There are two tasks in this procedure. The first task is the removal of the VHF communication transceiver. The second task in the installation of the VHF communication transceiver.
B. The VHF communication transceivers are installed on the top shelf of the E2 rack in the main equipment center. A rack connector is on the rear of each unit.
TASK 23-21-21-004-008
2. VHF Transceiver Removal_______________________
A. References
(1) AMM 20-10-07/201, E/E Rack-Mounted Components
B. Access
(1) Location Zone
205 Electronics Compartment
C. Procedure
S 864-001
(1) Open the applicable circuit breaker that follows and attach a DO-NOT-CLOSE tag:
(a)
P6-1 Circuit Breaker Panel
1) VHF-2
(b)
P18-2 Circuit Breaker Panel
1) VHF-1
2) VHF-3 (if installed)
S 024-002
(2) Remove the VHF communication transceiver (AMM 20-10-07/201).
TASK 23-21-21-404-009
3. VHF Communication Transceiver Installation__________________________________________
A. General
(1) When you do the VHF communication system installation test, make sure the airplane is not in or near any large metal structures. VHF communications while the airplane is on the ground can be degraded by airplane orientation or by rf signal attenuation. If the transmitted and received voice is not satisfactory, move the airplane to a better position.
B. References
(1)
AMM 20-10-07/201, E/E Rack-Mounted Components
(2)
AMM 23-21-00/501, VHF Communication System
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C.
D.
E.
F.
A
737-300/400/500MAINTENANCE MANUAL
(3)
AMM 24-22-00/201, Electrical Power - Manual ControlAccess
(1)
Location Zone 205 Electronics Compartment
Procedure
S 424-003
(1)
Install the VHF communication transceiver (AMM 20-10-07/201).
S 864-004 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 通讯 COMMUNICATIONS(29)
