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28-25-04
ALL ú ú 01 Page 403 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-083
CAUTION: YOU CANNOT TIGHTEN THE FUEL LINE COUPLING AFTER THE INITIAL
_______ INSTALLATION. YOU MUST INSTALL NEW O-RINGS WHEN YOU TIGHTEN THE FUEL LINE COUPLING AGAIN OR A FUEL LEAK CAN OCCUR.
(9)
If you must tighten the fuel line coupling again, disconnect the fuel line coupling and install new O-rings.
S 414-018
(10)
Install the spanwise beam access doors, if they were removed (AMM 28-11-09/401).
S 864-019
(11)
Go out of and close the fuel tank(s) (AMM 28-11-00/201).
TASK 28-25-04-004-020
4. APU Fuel Supply Line from Aft of the Rear Spar to the APU Firewall Removal__________________________________________________________________________ (Fig. 401)
A. References
(1)
AMM 25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
(2)
AMM 32-00-30/201, Landing Gear Door Locks
(3)
AMM 53-21-02/401, Main and Upper Deck Floor
B.
Equipment
(1)
Container - 1 U.S. gallon, suitable for containing fuel
(2)
Cord - to pull sections of flexible hose through the fuel line shroud
(3)
G28020-2, Wrench, APU fuel shroud
C.
Access
(1)
Location Zones 136 Wing Landing Gear Well, Right 142 Aft Cargo Container Compartment, Right 146 Bulk Cargo Compartment, Right 152 Area Aft of Bulk Cargo Compartment, Right 312 Area Aft of Pressure Bulkhead, Right 314 Stabilizer Torsion Box Compartment, Right 316 Area Aft of Stabilizer Box Compartment, Right
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-25-04
ALL ú ú 01 Page 404 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE F SEE E
SEE D SEE G
FLEXIBLE SEE C
HALF COUPLING
SEE B
SEE A
FERRULE-
TO-BOSS DISTANCE FERRULE EXPOSED THREAD
APU FUEL A-A
MANIFOLD
APU BOOST
BOOST PUMP PUMP INLET
LOW PRESSURE AND SCREEN
SWITCH APU FUEL
VALVE
PUMP DISCHARGE LINE
A
A
CHECK VALVE
PRESSURE
CHECK SWITCH
VALVE MAIN TANK
NO. 2 AFT DISCHARGE LINE
BOOST PUMP APU FUEL TO ENGINE FUEL
BOOST PUMP
FEED MANIFOLD APU FUEL BOOST
WING REAR SPAR PUMP CONTROL PRESSURE SWITCH
FWD INBD
A
APU Fuel Feed Line Installation Figure 401 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-25-04
ALL ú ú 02 Page 405 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
MANIFOLD SHROUD MANIFOLD FLEXIBLE HOSE AIR SEAL
BULKHEAD SHROUD
PRESSURE BULKHEAD
FROM APU FUEL VALVE REAR SPAR SHROUD DRAIN HOLE DUST COVER MANIFOLD SHROUD MANIFOLD SHROUD DRAIN FLEXIBLE HOSE MANIFOLD SHROUD DRAIN
FWD OUTBD ADAPTER FITTING B
FLAME ARRESTER
DRAIN VALVE ELEMENT
FWD INBD
C
APU Fuel Feed Line Installation Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 燃油 FUEL 3(98)
