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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 215-039
(15)
Make sure the APU fuel shutoff valve is in the open position.
S 285-102
(16)
Listen and make sure the aft boost pumps for the No. 2 and No. 3 main tanks operate.
S 865-044
(17)
Remove the DO-NOT-CLOSE tag and close this circuit breaker:
(a)
On the main power distribution panel, P6:
1) 6H5, FIRE EXTINGUISHER APU
S 865-026
(18)
Push the APU STOP switch on the M869 APU FIRE/SHUTDOWN MODULE, found in the body gear wheel well.
S 215-041
(19)
Make sure the APU fuel shutoff valve is in the closed position.
S 865-028
(20)
Set the APU control switch to the OFF position.
G.
Put the Airplane Back to Its Usual Condition
S 865-030
(1) Open and then close this circuit breaker:
NOTE: Wait for 5 minutes before you close the circuit breaker.
____ This will set the APU system to its usual condition.
(a) P6 Main Power Distribution Panel
1) 6H5, FIRE EXTINGUISHER APU
S 095-033
WARNING: DO THE PROCEDURE IN AMM 32-00-30/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS MOVE QUICKLY AND COULD CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Remove the wing and body gear door locks (AMM 32-00-30/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-031
(3) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
APU FUEL FEED SYSTEM - INSPECTION/CHECK
_______________________________________
1. General_______
A. This procedure contains these tasks:
(1)
Fuel Leak Check at the APU Shroud Drain Valve
(2)
Fuel Leak Check of the APU Fuel-Feed Line
TASK 28-25-00-706-075
2. Fuel Leak Check at the APU Shroud Drain Valve (Fig. 601)_____________________________________________
A. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 32-00-30/201, Landing Gear Door Locks
B.
Equipment
(1)
MIT65B00772 - Receptacle Assembly, Fuel Sump Drain, or equivalent
C.
Access
(1)
Location Zone
149 Keel Beam
D.
Prepare for the Procedure
S 796-052
WARNING: MAKE SURE THAT THE GROUND LOCKS ARE INSTALLED IN ALL OF THE
_______ LANDING GEAR. WITHOUT THE GROUND LOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Make sure the ground locks are installed in the nose and main gear (AMM 09-11-00/201).
S 486-053
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Open the doors for the landing gear and install the door locks (AMM 32-00-30/201).
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