(3)
Install dust caps on the electrical connectors.
S 034-028
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737-300/400/500MAINTENANCE MANUAL
TASK 34-31-62-404-047
3. Flight Instrument Accessory Unit Installation_____________________________________________
A. General
(1) The flight instrument accessory unit (M160) is on shelf No. 2 of the electronic equipment rack (E1).
B. References
(1)
AMM 20-10-07/201, E/E Rack-Mounted Components
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 34-31-02/501, VOR/ILS Navigation System
C. Access
(1)
Location Zone
205 Electronics Compartment
(2)
Access Panel
1201L Electronic Equipment Access Door
D. Procedure
S 864-030
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P18 Load Control Center - Left
1) INSTR XFR
2) IRS NO. 1 DC
3) VHF NAV-1 VOR/ILS
(b)
P6 Load Control Center - Right
1) IRS NO. 2 AC
2) IRS NO. 2 DC
3) VHF NAV-2 VOR/ILS
S 434-033
CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ ACCESSORY UNIT. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE ACCESSORY UNIT.
(2)
Remove the dust caps from the electrical connectors.
S 424-034
(3)
Do this task to install the flight instrument accessory unit in the E1 equipment rack: Install the Rack-Mounted E/E Box (AMM 20-10-07/201).
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A 737-300/400/500MAINTENANCE MANUAL
(4) S 864-035Remove the DO-NOT-CLOSE tags and close these circuit breakers. (a) P18 Load Control Center - Left 1) INSTR XFR 2) IRS NO. 1 DC 3) VHF NAV-1 VOR/ILS (b) P6 Load Control Center - Right 1) IRS NO. 2 AC 2) IRS NO. 2 DC 3) VHF NAV-2 VOR/ILS
(5) S 714-048Do the VHF NAV Transfer Switch Test part of the VOR/ILS Operational Test (AMM 34-31-02/501).
(6) S 864-043If electrical power is not necessary, do this task to remove the electrical power: Manual Control (AMM 24-22-00/201).
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TRANSFER RELAYS - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. This subject has two tasks. The first task is the removal of the transfer relay. The second task is the installation of the transfer relay and a test of the transfer relay.
B. These are the relays included in this subject:
(1)
Two antenna transfer relays:
(a)
ILS transfer relay No. 1 (R315)
(b)
ILS transfer relay No. 2 (R316)
(2)
Two VHF NAV transfer relays:
(a)
VHF NAV transfer relay No. 1 (R44)
(b)
VHF NAV transfer relay No. 2 (R45)
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