747-400
MAINTENANCE MANUAL

CONNECTOR (ATTACH TO THE AIR PRESSURE SOURCE) TEE

HOSE
MAIN FUEL SUPPLY LINE (REF)

BLEED VALVE SHUTOFF VALVE

PRESSURE GAGE

PRESSURE RELIEF VALVE (50 PSI MAXIMUM)
CONNECTOR (ATTACH TO THE MAIN FUEL SUPPLY LINE)

REGULATOR WHICH CAN DECREASE AIR PRESSURE TO 40 PSIG.
Pressure Check Equipment Figure 403
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 28-22-07
 ALL  ú
 ú  01B  Page 416
 ú  Oct 10/97 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
G83015
A
747-400
MAINTENANCE MANUAL

 A. General
 (1)  
This task contains procedures to remove the fuel line from engine disconnect to the the wing front spar.

 (2)  
Use this task to remove the fuel line tubes, couplings, O-ring(s) or fuel line components from the engine strut area.

 (3)  
This task can be done with or without fuel in the fuel tanks. If there is fuel in the fuel tanks, the engine spar valve must be closed and the fuel drained from the fuel line.

 B.
Equipment

 (1)  
Container - 5 gallon (20 liter) capacity, suitable for the
 collection of fuel.

 C.
Consumable Materials

 (1)  
D00128 Petrolatum, VV-P-236

 D.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 28-22-07/601, Engine Fuel Feed lines and Couplings

 (3)  
AMM 27-81-00/201, Leading Edge Flaps

 (4)  
AMM 54-62-00/201, Nacelle Strut Access Panels (Opening and Closing)

 (5)  
AMM 71-00-02/401, Power Plant - Removal/Installation

 (6)  
AMM 71-11-06/201, Core Cowl Panels

 (7)  
AMM 78-31-00/201, Thrust Reverser System

 (8)  
AIPC 28-22-07 FIG. 1

 (9)  
AIPC 28-22-07 FIG. 2

 (10)
 AIPC 28-22-07 FIG. 15

 (11)
 AIPC 28-22-07 FIG. 16

 E.
Access

 (1)  
Location Zones
 452 Nacelle Strut 1 - Torque Box
 521 Nacelle Strut 1 - Leading Edge to Front Spar
 462 Nacelle Strut 2 - Torque Box
 521 Nacelle Strut 2 - Leading Edge to Front Spar
 472 Nacelle Strut 3 - Torque Box
 621 Nacelle Strut 3 - Leading Edge to Front Spar
 482 Nacelle Strut 4 - Torque Box
 621 Nacelle Strut 4 - Leading Edge to Front Spar

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-07
 ALL  ú ú 01B Page 417 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  
Access Panels
 415 Thrust Reverser Half - Engine 1
 416 Thrust Reverser Half - Engine 1
 521FT Wing Leading Edge Cover - Nacelle Strut 1
 425 Thrust Reverser Half - Engine 2
 426 Thrust Reverser Half - Engine 2
 521CT Wing Leading Edge Cover - Nacelle Strut 2
 435 Thrust Reverser Half - Engine 3
 436 Thrust Reverser Half - Engine 3
 611CT Wing Leading Edge Cover - Nacelle Strut 3
 445 Thrust Reverser Half - Engine 4
 446 Thrust Reverser Half - Engine 4
 621FT Wing Leading Edge Cover - Nacelle Strut 4

 F.
Prepare for Removal

 S 864-023
 (1)  Supply the necessary electrical power (AMM 24-22-00/201).
 S 864-024
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT INSTALL THE SAFETY LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
　
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