(2)
A tank to install the receiver for the APU fuel boost pump.
TASK 28-25-09-004-001
2. APU Fuel Boost Pump Receiver Removal (Fig. 401)____________________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-25-01/401, APU Fuel Boost Pump
(3)
AMM 28-26-00/201, Defueling
(4)
AIPC 28-25-01 Fig. 2
(5)
AIPC 28-25-04 Fig. 1
B.
Access
(1)
Location Zone 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left
C.
Procedure
S 034-002
(1)
Remove the APU fuel boost pump (AMM 28-25-01/401).
S 654-003
(2)
Defuel the No. 2 main tank (AMM 28-26-00/201).
S 864-004
WARNING: YOU MUST OBEY ALL OF THE FUEL TANK PURGING AND ENTRY
_______ PRECAUTIONS. IF YOU DO NOT OBEY ALL THE FUEL TANK PURGING AND ENTRY PRECAUTIONS, YOU CAN INJURE YOURSELF OR CAUSE DAMAGE TO THE AIRPLANE.
(3)
Purge and go into the No. 2 main tank through the access door, 544AB (AMM 28-11-00/201).
(4)
Disconnect the inlet tube coupling (2) from the receiver (1).
S 034-005
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28-25-09
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A
747-400 MAINTENANCE MANUAL
S 034-020
(5)
Discard the packing (3).
S 034-006
(6)
Disconnect the discharge tube coupling (4) from the receiver (1).
S 034-021
(7)
Discard the packing (5).
S 034-007
(8)
Hold the receiver (1) in the tank.
S 034-022
(9)
From out of the tank, remove the socket-head bolts (7), the washers (8), and the spacer (9) that attach the receiver to the rear spar.
S 024-008
(10)
Remove the receiver (1) from the spar.
S 034-023
(11)
Discard the packing (6).
TASK 28-25-09-404-009
3. APU Fuel Boost Pump Receiver Installation (Fig. 401)
_________________________________________
A. Consumable Materials
(1)
D00128 Petrolatum - Technical, VV-P-236
B.
Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Impeller Housing Assy (Receiver) | 28-25-01 | 02 | 110 | | | 3 | Packing | 28-25-04 | 01 | 135 | | | 5 | Packing | | | 130 | | | 6 | Packing | 28-25-01 | 02 | 105 | | | 7 | Bolt | | | 95 | | | 8 | Washer | | | 100 | | | 9 | Spacer* | | | | 2......…........…...................................…..........….....….........1
*TO BE FURNISHED
C. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-25-01/401, APU Fuel Boost Pump
D.
Access
(1)
Location Zone 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left
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A
747-400
MAINTENANCE MANUAL
8. WASHER (3 LOCATIONS)
APU FUEL BOOST PUMP RECEIVER
APU Fuel Boost Pump Receiver Installation
Figure 401
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A
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