(2)
AMM 33-51-00/201, Emergency Lights
B. Access
(1) Location Zones
221 Control Cabin - LH
222 Control Cabin - RH
C. Prepare for Removal of the Miscellaneous Switching Module
S 864-002
(1) Open these circuit breakers:
(a) P6 Main Power Distribution Panel 1) 6C1 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 1
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MAINTENANCE MANUAL
2) 6C2 ALTN PWR ENG FIRE OVHT DET LOOP A ENG 2 3) 6C3 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 3 4) 6C4 ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 4 5) 6C5 ALTN PWR LOOP A APU FIRE/BLD DUCT OVHT 6) 6C7 W/W FIRE DET AC 7) 6G10 ENG FIRE/OVHT DET ENG 2 LOOP A 8) 6G11 ENG FIRE/OVHT DET ENG 2 LOOP B 9) 6G12 ENG FIRE/OVHT DET ENG 4 LOOP A 10) 6G13 ENG FIRE/OVHT DET ENG 4 LOOP B 11) 6H10 ENG FIRE/OVHT DET ENG 1 LOOP A 12) 6H11 ENG FIRE/OVHT DET ENG 1 LOOP B 13) 6H12 ENG FIRE/OVHT DET ENG 3 LOOP A 14) 6H13 ENG FIRE/OVHT DET ENG 3 LOOP B 15) 6H14 APU FIRE/BLD DUCT OVHT LOOP A 16) 6H15 APU FIRE/BLD DUCT OVHT LOOP B
(b) P7 Overhead Circuit Breaker Panel 1) 7A20 INTERPHONE CAPT 2) 7A21 INTERPHONE F/O 3) 7A22 INTERPHONE OBS 4) 7A23 INTERPHONE- SERV 5) 7H14 CARGO SMOKE DET LWR A 6) 7H15 CARGO SMOKE DET LWR B 7) 7H16 CARGO SMOKE - MAIN DECK ZN 1-8 DET A 8) 7H17 CARGO SMOKE - MAIN DECK ZN 1-8 DET B 9) 7H18 CARGO SMOKE - MAIN DECK ZN 9-16 DET A 10) 7H19 CARGO SMOKE - MAIN DECK ZN 9-16 DET B 11) 7H21 FUEL XFR VALVE MAIN 1 12) 7H24 FUEL XFR VALVE MAIN 4
S 864-004
(2)
Provide electrical power (AMM 24-22-00/201)
S 864-005
(3)
Make sure these circuit breaker are closed:
(a) P7 Overhead Circuit Breaker Panel
1) 7G14 EMER LTS CHARGING FWD
2) 7G15 EMER LTS CHARGING AFT
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747-400 MAINTENANCE MANUAL
D. Remove the Module
S 864-006
(1)
Set the EMER LIGHTS switch on the module to OFF.
S 034-007
(2)
Loosen the four screws on the module.
S 024-008
(3)
Remove the module from the P5 panel.
NOTE: Electrical connectors are still attached to rear of module.
____
S 034-009
(4)
Disconnect the electrical connectors from the module (AMM 33-51-00/201).
S 864-010
(5)
Make sure that the electrical power stays supplied to the airplane until a replacement module has been installed.
TASK 26-10-02-404-011
3. Install the Miscellaneous Switching Module (M7317)
__________________________________________________
A. References
(1)
AMM 23-41-00/501, Service Interphone System
(2)
AMM 23-51-00/501, Flight Interphone System
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 26-10-00/501, Detection
(5)
AMM 28-16-04/401, Main Tank Transfer Valve Actuator
B. Access
(1) Location Zones
221 Control Cabin - LH
222 Control Cabin - RH
C. Install Module
S 864-012
(1)
Before you replace the module, make sure the OBS AUDIO SYSTEM switch is set to NORM and the SERV INTPH and EMER LIGHTS switches are set to OFF.
(2)
Connect the electrical connectors to the module.
(3)
Install the module in the P5 panel.
(4)
Tighten the four screws.
S 434-013
S 424-014
S 434-015
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