NOTE: The lanyard will hold the right access door on the APU
____
compartment bulkhead.
(d)
Remove the two quick-release pins, disconnect the two hold-open rods and put the two hold-open rods in the two clips on the left access door.
(e)
Install the two quick-release pins in the two brackets on the left APU compartment bulkhead.
(f)
Make sure the insulation covers are correctly attach to the APU compartment firewall.
(g)
Lift the left access door until the two APU access doors are approximately aligned.
(h)
Close the two APU access doors.
(i)
Close the six latches on the right access door.
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747-400 MAINTENANCE MANUAL
AUXILIARY POWER UNIT - ADJUSTMENT/TEST
______________________________________
1. General_______
A. A test of the correct operation of the APU is done each time it is started and stopped. This procedure does not have a test for the operation of the APU. This procedure contains three tasks. These tasks are:
(1)
Remote Stop Switch Shutdown Test
(2)
Fire Switch Shutdown Test (The Remote Panel Location)
(3)
APU Ground Test.
B.
The fire switch is on the P5 panel on the flight deck. The remote stop switch is in the right wheel well of the main landing gear.
C.
The APU ground test is done from the CMC on the flight deck.
TASK 49-11-00-705-001
2. Remote Stop Switch Shutdown Test (Fig. 501)________________________________
A. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 24-22-00/201, Electrical Power
(3)
AMM 31-61-00/501, Integrated Display System (IDS)
(4)
AMM 32-00-30/201, Landing Gear Door Locks
(5)
AMM 32-09-02/201, Air/Ground Relays
(6)
AMM 45-10-00/501, Central Maintenance Computer (CMC)
(7)
AMM 49-11-00/201, Auxiliary Power Unit (Start and Operate APU)
B.
Access
(1)
Location Zone
138 Body Landing Gear Well, RH
(2)
Access Panel
761 Body Landing Gear - Aft Inboard, RH
763 Body Landing Gear - Fwd Inboard, RH
C.
Preconditions
S 865-056
(1)
These conditions are necessary for this task:
(a)
Electrical Power On (AMM 24-22-00/201).
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747-400
MAINTENANCE MANUAL
B
APU Fire Shutdown Module (Remote Panel Location)
Figure 501
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747-400 MAINTENANCE MANUAL
(b)
Integrated Display System (IDS), serviceable (AMM 31-61-00/501).
(c)
Central Maintenance Computer (CMC), serviceable (AMM 45-10-00/501).
(d)
Airplane must be in the ground mode (AMM 32-09-02/201).
D.
Procedure
S 865-002
(1) Make sure the ground locks for the landing gear are installed (AMM 09-11-00/201).
S 495-003
WARNING: MAKE SURE YOU INSTALL THE LOCKS FOR THE LANDING GEAR DOORS
_______ CORRECTLY. AN INCORRECT INSTALLATION OF THE LOCKS CAN CAUSE A FAST MOVEMENT OF THE LANDING GEAR DOORS. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS OR CAUSE DAMAGE TO THE EQUIPMENT.
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