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A
747-400
MAINTENANCE MANUAL
APU FUEL SHUTOFF VALVE ACTUATOR
SEE A
VALVE BODY
NO. 2 MAIN FUEL TANK REAR SPAR
VALVE BODY MOUNTING
BOLT (4 LOCATIONS)
ACTUATOR
MANUAL OVERRIDE LEVER (POSITION INDICATOR)
FWD
A
APU Fuel Shutoff Valve Actuator Position Indication
Figure 502
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E30056
A
747-400
MAINTENANCE MANUAL
(b) Make sure the APU fuel shutoff valve is in the closed position.
S 865-131
(7) Push the APU fire handle in to the normal position.
(a) Make sure the display APU comes into view on the main EICAS or
the status EICAS screen.
S 865-222
(8) Set the APU control switch to the OFF position.
S 865-132
(9) Set the APU control switch on the P5 panel to the ON position.
NOTE:____ Operate the switch through a cycle.
(a) Make sure the APU fuel shutoff valve actuator manual override
lever is in the open position (Fig. 502).
S 865-133
(10)
Set the APU control switch to the OFF position.
S 865-134
(11)
Erase the APU STATUS message (AMM 31-61-00/201).
S 035-135
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(12)
Do the Removal of the Door Locks on the Wing Landing Gear task (AMM 32-00-30/201).
S 095-137
(13)
Do the Removal of the Door Locks on the Body Landing Gear task (AMM 32-00-30/201).
S 865-054
(14)
Remove the electrical power if no longer necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
APU FIRE DETECTOR - REMOVAL/INSTALLATION
________________________________________
1. General_______
A. Four tasks are given in this section. The first and second tasks are the removal and installation of APU fire detector element. The third and fourth tasks are the removal and installation of APU fire detector assemblies M216 and M217.
B. Two dual-element APU fire detectors are installed in the APU compartment, on the left APU access door and near upper aft APU mount. The removal/installation procedure is the same for each detector element.
C. The detectors can be accessed by the access doors below the APU.
TASK 26-15-02-004-001
2. Remove APU Fire Detector Element (Fig. 401)________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
26-15-00/501, APU Fire Detection
(3)
IPC 26-15-02 Fig. 2
(4)
WDM 26-15-11
(5)
SSM 26-15-01
B. Access
(1)
Location Zone
317 APU Compartment, LH
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