ELECTRICALCAP ON DISCHARGE
DISCHARGE
ASSEMBLY NOT USED CONNECTOR (REF)
PORT (REF)
(REF) APU SHUTDOWN REMOTE CONTROL PANEL, P62
APU FIRE EXTINGUISHER BOTTLE, B25
D
C
Component Location
Figure 102 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
FAULT ISOLATION/MAINT MANUAL
g 1 L g 2 ENG gg R 21 SQUIB TEST g APU YQML5 APU LIGHT,
1 AFT CARGO 2 1 FWD 2 TEST SWITCH, YQMS1 SQUIB TEST
SQUIB TEST CONTROL PANEL, M10401 (REF) gggg APU SHUTDOWN REMOTE CONTROL PANEL, P62 DSEE
B FROM SHT 1
FIREWALL APU
APU FIRE
EXTINGUISHER
BOTTLE, B25
APU BTL DISCH
SEE C 313AL SWITCH, S485
PRESSURE SWITCH (REF)
L00401
LIGHT-
HEX KEY FOR SAFETY RELIEF
FIRE APU
GROUND TEST AND FILLER PORT
(TURN CW FOR (REF)
SIMULATED
BTL DISCH)
r
S00484
S00485 SWITCH-APU
SWITCH-APU FIRE SHT DN
BTL DISCH
D00479
INOP
ELECTRICAL
CONNECTOR
WITH SHUNT
ELECTRICALCAP ON DISCHARGE
DISCHARGE
ASSEMBLY NOT USED CONNECTOR (REF)
PORT (REF)
(REF)
APU SHUTDOWN REMOTE CONTROL PANEL, P62
APU FIRE EXTINGUISHER BOTTLE, B25
D
C
Component Location
Figure 102 (Sheet 3)
D02978
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
APU FIRE EXTINGUISHING SYSTEM - ADJUSTMENT TEST
_______________________________________________
1. General_______
A. The APU fire extinguishing system has one fire bottle installed on the forward side of the APU firewall.
(1) The system test has different tests for each part of the system. When all the tests are done, the APU fire extinguishing system is ready to operate correctly.
TASK 26-22-00-715-156
2. Operational Test - APU Bottle Pressure Switch_____________________________________________
A. References
(1)
AMM 06-42-00/201, Empennage (Major Zone 300) Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 31-41-00/501, EICAS
(4)
AMM 33-16-00/501, MASTER DIM AND TEST
B. Access
(1)
Location Zones
211 Flight Compartment (Left)
212 Flight Compartment (Right)
315 APU Compartment (Left)
316 APU Compartment (Right)
(2)
Access Panels
313AL Control Bay Access Door
315AL APU Access Door
316AR APU Access Door
C. Prepare for Test
S 865-001
(1)
Supply electrical power (AMM 24-22-00/201).
S 715-002
(2)
Make sure these systems operate:
(a)
EICAS (AMM 31-41-00).
(b)
Master dim and test system (AMM 33-16-00).
S 865-003
(3) Make sure that the following circuit breakers on the overhead circuit breaker panel, P11, are closed:
(a)
11B24, FIRE DETECTION APU 1
(b)
11B25, FIRE DETECTION APU 2
S 865-004
(4) Make sure that the following circuit breakers on the main power distribution panel, P6, are closed:
(a)
6G1, FIRE EXT APU
(b)
6H1, FIRE EXTINGUISHING ENG L BTL 1
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