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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL
S 865-013
(4) Close these circuit breakers:
(a) P6 Main Power Distribution Panel
1) 6C2, ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 2
2) 6G10, ENG FIRE/OVHT DET ENG 2 LOOP A
3) 6G11, ENG FIRE/OVHT DET ENGT 2 LOOP B
S 755-014
(5) Push and hold the FIRE/OVHT TEST switch on the M7317 module.
(a) Make sure the engine 1 and 2 fire switch lights come on and the engine 3, 4, and APU fire switch lights do not come on.
S 865-016
(6)
Release the test switch on the M7317 module.
S 865-017
(7)
Close these circuit breakers:
(a) P6 Main Power Ditribution Panel
1) 6C3, ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 3
2) 6H12, ENG FIRE/OVHT DET ENG 3 LOOP A
3) 6H13, ENG FIRE/OVHT DET ENG 3 LOOP B
S 755-018
(8) Push and hold the FIRE/OVHT TEST switch on the M7317 module.
(a) Make sure the engine 1, 2, and 3 fire switch lights come on and the engine 4 and APU fire switch lights do not come on.
S 865-020
(9)
Release the test switch on the M7317 module.
S 865-021
(10)
Close these circuit breakers:
(a) P6 Main Power Ditribution Panel
1) 6C4, ALTN PWR ENG FIRE/OVHT DET LOOP A ENG 4
2) 6G12, ENG FIRE/OVHT DET ENG 4 LOOP A
3) 6G13, ENG FIRE/OVHT DET ENG 4 LOOP B
S 755-022
(11)
Push and hold the FIRE/OVHT TEST switch on M7317 module.
(a) Make sure the engine 1, 2, 3, and 4 fire switch lights come on and the APU fire switch light does not come on.
(12)
Release the test switch on M7317 module.
S 865-024
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 865-025
(13) Close these circuit breakers:
(a) P6 Main Power Ditribution Panel
1) 6C5, ALTN PWR APU FIRE/BLD DUCT OVHT LOOP A
2) 6H14, APU FIRE/BLD DUCT OVHT LOOP A
3) 6H15, APU FIRE/BLD DUCT OVHT LOOP B
S 755-026
(14) Push and hold the FIRE/OVHT TEST switch on the M7317 module.
(a) Make sure the engine 1, 2, 3, 4 and APU fire switch lights come on.
S 865-028
(15)
Release the test switch on the M7317 module.
S 865-029
(16)
Close these circuit breakers:
(a) P7 overhead circuit breaker panel.
1) 7H14, CARGO SMOKE DET LWR A
2) 7H15, CARGO SMOKE DET LWR B
S 755-030
(17) Push and hold the FIRE/OVHT TEST switch on the M7317 module.
(a) Make sure the FWD CARGO FIRE and AFT CARGO FIRE lights come on.
S 755-032
(18) Release the test switch on the M7317 module.
(a) Make sure the 6H6 FIRE EXTINGUISHER LOWER CARGO circuit breaker on the P6 main power distribution panel is open.
S 865-033
(19) Push the FWD CARGO FIRE switch/light.
(a) Make sure the ARMED light comes on.
S 865-034
(20) Push the FWD CARGO FIRE switch/light.
(a) Make sure the ARMED light, on the switch, goes off.
S 865-035
(21) Push the AFT CARGO FIRE switch/light.
(a) Make sure the ARMED light comes on.
S 865-036
(22) Push the AFT CARGO FIRE switch/light.
(a) Make sure the ARMED light, on the switch, goes off.
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A
747-400 MAINTENANCE MANUAL
S 865-038
(23) Put the MASTER DIM & TEST switch S6, on the M7262 light control module, in the TEST position.
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