(a) 6G1, FIRE EXT APU
(3)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
(4)
Close controls bay access door 313AL.
S 866-153
S 416-154
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757 MAINTENANCE MANUAL
APU FIRE EXTINGUISHING- APU/CARGO FIRE CONTROL PANEL
______________________________________________
REMOVAL/INSTALLATION
____________________
1. General_______
A. This procedure contains two tasks. The first task removes the APU/CARGO FIRE Control Panel and the second task installs and tests it.
TASK 26-22-03-004-019
2. Remove the APU/CARGO FIRE Control Panel (Fig. 401)_______________________________________
A. General
(1) The APU/CARGO FIRE Control Panel, M10444, is on the aft pilot's control stand, P8.
B. Access
(1) Location Zone
211/212 Flight Compartment
C. Prepare for Removal
S 864-019
(1) Open these circuit breakers on the main power-distribution panel, P6, and attach DO-NOT-CLOSE tags:
(a)
6B3, GEN CONT UNIT APU
(b)
6E3, FUEL VALVES APU
(c)
6G1, FIRE EXT APU
(d)
6H5, FIRE EXTINGUISHING CARGO BTL 1
(e)
6H6, FIRE EXTINGUISHING CARGO BTL 2
S 864-020
(2) Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11A32, INDICATOR LIGHTS 1
(b)
11A33, INDICATOR LIGHTS 2
(c)
11B18, WARN ELEX B
(d)
11B20, FIRE DETECTION L ENGINE 1
(e)
11B21, FIRE DETECTION L ENGINE 2
(f)
11B22, FIRE DETECTION R ENGINE 1
(g)
11B23, FIRE DETECTION R ENGINE 2
(h)
11B24, FIRE DETECTION APU 1
(i)
11B25, FIRE DETECTION APU 2
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757
MAINTENANCE MANUAL
SEE B SEE A
FLIGHT COMPARTMENT
SEE C
w ARMED w ARMED APU BTL
FWD AFT C DISCH a
r r A
R
G
O FIRE/OVHT TEST
1-BTL DISCH-2
R I F DISCH r WHL WELL ENG CARGO ENG/APU SYS FAIL
w w E
DISCH DISCH FAIL
a a P-RESETA
APU AND CARGO FIRE CONTROL PANEL
FIRE/OVHT TEST PANEL
A
PRESSURE SAFETY RELIEF
B
SWITCH AND FILLER PORT SAFETY
GROUND TEST PRESSURE SWITCH RELIEF
PUSHBUTTON AND
MOUNTING
FILLER
LUGS (4) HEX KEY FOR PORT GROUND TEST (TURN CW FOR MOUNTING SIMULATED LUGS (4) BTL DISCH)
DISCHARGE ELECTRICAL DISCHARGE
DISCHARGE ASSEMBLY
CAP ON UNUSED
PORT CONNECTOR PORT CAP ON UNUSED ELECTRICAL
APU FIRE EXTINGUISHER BOTTLE
DISCHARGE ASSEMBLY
CONNECTOR C1
APU FIRE EXTINGUISHER BOTTLE
1 ALL EXCEPT GUN 051 C2
2 GUN 051
APU Fire Extinguisher System Component Location
Figure 401
D04387
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757 MAINTENANCE MANUAL
(j)
GUN 051;
11B26, CARGO SMOKE DET 1
(k)
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