GENERAL AEROSPACE
Boeing 737-300
MAINTENANCE MANUAL
EFFECTIVITY
PW245
34-53-41GA
DRAWING # GA-KD28-ATC-MM
Page 401
Use and disclosure shall be in accordance with the proprietary legend located on the cover of this document
Aug 15/10
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.
Bottom ATC antenna switch, S9001. The ATC antenna switches are installed on the E2-2 rack.
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
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P18 Load Control Center - Left
1)
ATC-1 AC
2)
ATC-1 DC
(b)
P6 Load Control Center - Right
1)
ATC-2 AC
2)
ATC-2 DC
C.
Procedure
(1)
Remove the electrical connector from the ATC antenna switch.
(2)
Remove the nuts and screws from the ATC antenna switch.
(3)
Remove the ATC antenna switch.
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
C.
Access
(1)
Location Zones
101/102 Flight Compartment
205 Electronic Compartment
(2)
Access Panels
1201 Electronics Equipment Access Door
D.
Prepare for the Installation
(1)
Make sure these circuit breakers are open:
(a)
P18 Load Control Center - Left
1)
ATC-1 AC
2)
ATC-1 DC
(b)
P6 Load Control Center - Right
1)
ATC-1 AC
2)
ATC-1 DC
E.
Procedure
(1)
Make sure the ATC antenna switch bracket has no corrosion. If there is corrosion, clean the mating
surfaces (AMM 20-10-34/701).
(2)
Use the electrical bond fastener to install the ATC antenna switch on the bracket (SWPM 20-20-00).
(3)
Install the antenna transfer switch.
