(a)
P6-2 Main Power Distribution Panel
1) 6K18, APU ALTN CONT
(b)
P83 Aft APU Equipment Control and Circuit Breaker Panel 1) APU PRIME CONT
S 862-082
(2)
Remove the DO-NOT-OPERATE tag from the APU control switch on the P5 overhead panel.
S 792-114
(3)
Do the installation test for the fuel pump outlet filter element:
(a)
Do this task: APU Starting and Operation (AMM 49-11-00/201).
(b)
Operate the APU for a minimum of five minutes.
(c)
During the APU operation, examine the fuel pump filter cover for signs of fuel leakage.
(d)
If you find fuel leakage, then do these steps to repair the leakage: 1) Do this task: APU Usual Shutdown (AMM 49-11-00/201). 2) Attach a DO-NOT-OPERATE tag to the APU control switch on
the P5 overhead panel. 3) Repair the cause of the fuel leakage. 4) Remove the DO-NOT-OPERATE tag from the APU control switch
on the P5 overhead panel. 5) Do this task: APU Starting and Operation (AMM 49-11-00/201). 6) During the APU operation, examine the fuel pump filter cover for signs of fuel leakage. 7) If you find fuel leakage, do the leakage repair again.
(e) If it is not necessary to do other tasks, do this task: APU Usual Shutdown (AMM 49-11-00/201).
S 412-083
(4)
Close the left APU access door, 317AL, and right APU access door, 318AR:
(a)
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 right access door.
(b)
Install the two quick-release pins in the two brackets on the right APU compartment bulkhead.
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49-31-00
ALL ú ú 05 Page 213 ú Jun 18/01
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747-400 MAINTENANCE MANUAL
(c) Lift the right access door until you can install the lanyard on the pin at the aft APU compartment bulkhead.
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.
TASK 49-31-00-002-098
7. Fuel Pump Cover Plug Removal (Fig. 201)
____________________________
A. Equipment
(1)
Container - Fuel Resistant, 1 U.S. Gallon (4 Liters)
B.
Access
(1)
Location Zones
221 Control Cabin - Left
222 Control Cabin - Right
310 Fuselage - Station 2360 to Station 2792
(2)
Access Panels
317AL APU Access Door - Left
318AR APU Access Door - Right
C.
Prepare for the Removal
S 862-099
(1)
Make sure the APU control switch on the P5 overhead panel is OFF and attach a DO-NOT-OPERATE tag.
S 862-100
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Main Power Distribution Panel
1) 6K18, APU ALTN CONT
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