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26-10-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
F. Do the APU Check
S 866-026
(1)
Open all of the circuit breakers on the P11 panel in Table 603 for the APU fire detection system and attach DO-NOT-CLOSE tags. ~..................................................... | Table 603 | ....................................................... | SYSTEM | CIRCUIT BREAKERS | ....................................................... | APU FIRE | 11A32, INDICATOR LIGHTS 1 | | | 11A35, INDICATOR LIGHTS 4 | | | 11B18, WARN ELEX B | | | 11B24, FIRE DETECTION APU 1 | | | 11B25, FIRE DETECTION APU 2 | | | 11J25, FIRE DET ALTN PWR APU | | | 11J33, WARN ELEX A | | | 11P29, R IND LTS 2 | 2................…....................................1
S 026-027
(2)
Remove the printed-circuit cards, M685 and M686, from the fire detection card file, P54. P54 is in the E/E bay adjacent to the right side of the nose gear wheel well.
S 866-028
(3)
Remove all of the DO-NOT-CLOSE tags and close the circuit breakers in Table 603.
S 756-029
(4)
Make sure these indications occur:
(a)
The yellow FAIL P-RESET light (P8) is on.
(b)
The EICAS message, FIRE/OVHT SYS, shows on the top display.
S 866-030
(5)
Push the FAIL P-RESET switch-light.
S 216-077
(6)
Make sure these indications occur:
(a)
The switch-light goes off.
(b)
The EICAS message, FIRE/OVHT SYS, does not show.
(7)
Open the circuit breakers in Table 603 and attach DO-NOT-CLOSE tags.
(8)
Install the printed-circuit cards, M685 and M686.
S 866-031
S 426-032
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757 MAINTENANCE MANUAL
S 866-033
(9) Remove all of the DO-NOT-CLOSE tags and close the circuit breakers in Table 603.
G. Do the Cargo Check
S 016-099
(1)
Open forward and aft cargo doors (AMM 52-34-00/201).
S 866-034
(2)
Turn the computer switch on the EICAS DISPLAY SELECT PANEL, P9, to the AUTO position.
S 866-035
(3)
Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(a)
11B26, FIRE DETECTION CARGO 1 or CARGO SMOKE DET 1
(b)
11B27, FIRE DETECTION CARGO 2 or CARGO SMOKE DET 2
(c)
11J24, FIRE DET ALTN PWR CARGO
S 036-036
(4)
Disconnect the electrical connectors, D4402 and D4404, from the smoke detectors in the forward cargo compartment, M10458 and M10459. The smoke detector assembly in the forward cargo compartment (detectors, blowers, and plenum pressure switch) is installed in the cargo compartment ceiling, just aft of No. 1 cargo door.
S 866-038
(5)
Remove all of the DO-NOT-CLOSE tags and close these P11 panel circuit breakers:
(a)
11B26, FIRE DETECTION CARGO 1 or CARGO SMOKE DET 1
(b)
11B27, FIRE DETECTION CARGO 2 or CARGO SMOKE DET 2
S 756-039
(6)
Make sure these indications occur:
(a)
The yellow FAIL P-RESET switch-light, on the pilots control stand, P8, comes on.
(b)
The EICAS message, FIRE/OVHT SYS, shows.
(c)
These EICAS messages show.
1) FWD CARGO DET 1
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