73-11-05
 ALL  ú ú N02 Page 480Y ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FUEL TUBES - REMOVAL/INSTALLATION
_________________________________
 1.  General
_______
 A.  This procedure gives the tasks for the removal and the installation of the tube in the fuel system.
 B.  It is not necessary to remove the fuel tubes for the usual maintenance. If the one or more of these conditions show, you can remove the fuel tubes:
 (1)
The fuel tubes are damaged

 (2)
The fuel tubes have leaks

 (3)
The fuel tubes prevent the removal of the engine component.

 C.  
When you remove the fuel tubes, you must use this procedure.

 D.  
You can get the access to the fuel tubes when you open the left or the right thrust reverser.

 TASK 73-11-06-004-001-N00
 2.  Fuel Tube Removal
_________________
 A.  References
 (1)
AMM 71-11-04/201, Fan Cowl Panels

 (2)
AMM 71-11-06/201, Core Cowl Panels

 (3)
AMM 78-31-00/201, Thrust Reverser System

 B.  
Access

 (1)  
Location Zone 412 Engine 1 - High Pressure Compressor (HPC) Case, Diffuser and Combustor Case 422 Engine 2 - High Pressure Compressor (HPC) Case, Diffuser and Combustor Case 432 Engine 3 - High Pressure Compressor (HPC) Case, Diffuser and Combustor Case

 442  Engine 4 - High Pressure Compressor (HPC) Case, Diffuser and Combustor Case

 (2)  
Access Panel
 415 Left Thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4

 C.  
Procedure

 (1)
Open the fan cowl panel (AMM 71-11-04/201).

 S 014-013-N00
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 73-11-06
 ALL  ú ú N01 Page 401 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-017-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (AMM 78-31-00/201).

 S 014-014-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 014-016-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the thrust reverser (AMM 78-31-00/201).

 S 024-003-N00

 (5)  
Remove the fuel tube:

 (a)
Disconnect the coupling nuts or the flexible fittings.

 (b)  
Remove the fuel tube from the engine.

 S 934-004-N00
 (6)  Attach a tag with the name and the location to each fuel tube that you disconnected or removed.
 NOTE: If you remove the tubes from different systems, you must
____ be careful and not connect the tubes at the incorrect location.
 S 934-005-N00
 (7)  
Attach a tag or put a note on the location of all clips, support clamps, and brackets to make sure they are installed correctly.

 S 034-006-N00

 (8)  
Install the caps:

 (a)  
Install the cap on the disconnected or removed fuel tube.

 (b)  
Install the cap on the openings on the engine where you removed the fuel tube.

 TASK 73-11-06-404-008-N00
 3. Fuel Tube Installation
______________________
 A. References
 (1)  
AMM 70-24-01/201, Fittings

 (2)  
AMM 71-00-00/501, Power Plant

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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