34-53-31
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A
737-300/400/500MAINTENANCE MANUAL
AIR TRAFFIC CONTROL (ATC) ANTENNA SWITCH -
__________________________________________ REMOVAL/INSTALLATION
____________________
1. General_______
A. This procedure has two tasks. One is the removal of the ATC antenna switch; the other is the installation of the ATC antenna switch.
B. The top and bottom ATC antenna switch, S00942 and S00943, installations are the same. The ATC antenna switches are installed on the E3 rack.
TASK 34-53-41-004-044
2. ATC Antenna Switch Removal__________________________
A. Access
(1)
Location Zones
205 Electronic Compartment
(2)
Access Panels
1201 Electronics Equipment Access Door
B. Prepare for the Removal
S 864-002
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6 Circuit Breaker Panel
1) C1194 ATC ANT SW
2) C186 ATC LEFT
(b)
P18 Circuit Breaker Panel
1) C188, ATC RIGHT
C. Procedure
S 034-003
(1)
Remove the electrical connector from the ATC antenna switch.
S 034-004
(2)
Remove the nuts and screws from the ATC antenna switch.
(3)
Remove the ATC antenna switch.
S 024-005
TASK 34-53-41-404-045
3. ATC Antenna Switch Installation_______________________________
A. Equipment
(1) Resistance measuring bridge or ohmmeter which
can measure 0.001 ohm
B. References
(1)
AMM 20-10-34/701, Metal Surfaces
(2)
SWPM 20-20-00, Standard Wiring Practices Manual
(3)
AMM 24-22-00/201, Electrical Power - Control
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ATC MODE S ú
34-53-41
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
(4) IPC 34-53-41-01 Fig. 1Access
(1) Location Zones 101/102 205 Flight CompartmentElectronic Compartment
(2) Access Panels 1201 Electronics Equipment Access Door
Prepare for the Installation
S 754-007
(1) Make sure these circuit breakers are open:
(a)
P6 Circuit Breaker Panel 1) C1194 ATC ANT SW 2) C186 ATC LEFT
(b)
P18 Circuit Breaker Panel
1) C188 ATC RIGHTProcedure
S 214-008
(1)
Make sure the ATC antenna switch bracket has no corrosion. If there is corrosion, clean the mating surfaces (AMM 20-10-34/701).
S 424-009
(2)
Use the electrical bond fastener to install the ATC antenna switch on the bracket (SWPM 20-20-00).
S 424-061
(3)
Install the antenna transfer switch.
NOTE: Make sure to install the part number as shown in the IPC
____ (IPC 34-53-41-01).
S 434-010
(4)
Tighten the screws on the ATC antenna switch.
S 764-011
(5)
Make sure the resistance from the ATC antenna switch to the E2 rack is less than 0.001 ohm.
S 864-012
(6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6 Circuit Breaker Panel 1) C1194 ATC ANT SW 2) C186 ATC LEFT
(b)
P18 Circuit Breaker Panel 1) C188 ATC RIGHT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ATC MODE S ú
34-53-41
ú ú 01 Page 402 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
F. ATC Antenna Switch Test
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