(a)  
Remove all tools, all equipment, and all unwanted material from the fuel tank.

 (b)  
Install the applicable left or right fuel tank access panels, No. 1 and No. 2, for the fuel tank (AMM 28-11-11/401).

 (10)
 Fill the fuel tanks with fuel (AMM 12-11-00/301).

 S 794-022

 (11)
 Do the Fuel Boost Pump Valve, Vent Valve and Check Valve and Pressure Fuel Line Outlet Check Valve Test (AMM 28-22-00/501).

 S 654-021
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-14
 ALL  ú ú 01 Page 404 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 FUEL LINE AND COUPLINGS - REMOVAL/INSTALLATION
______________________________________________
 1.  General
_______
 A.  This procedure has two tasks:
 (1)
A task to remove a fuel line in the engine fuel-feed system

 (2)
A task to install a fuel line in the engine fuel-feed system.

 B.  This procedure gives a general procedure to remove and to install the fuel lines and the couplings in the engine fuel-feed system. Three types of couplings are used:
 (1)
A flexible full coupling

 (2)
A flexible half coupling

 (3)
A rigid coupling.

 C.  If a fuel line has damage, it is frequently necessary to cut the line into sections to remove it or to install it. Thus, if there is damage to a line that is longer than the length of one rib bay, you must remove only the section with damage.
 D.  Connect the end of a line that goes to a rigid coupling first. Connect the end of the line that goes to a flexible coupling last.
 E.  Do not loosen a rigid coupling to make it easier to install the other couplings in a fuel line.
 F.  Make sure the fuel tube has the correct clearance after installation (AMM 54-10-00/201).
 TASK 28-22-15-004-001
 2.  Fuel Line Removal
_________________
 A.  References
 (1)
AMM 28-10-00/201, Fuel Storage

 (2)
AMM 28-11-11/401, Wing Fuel Tank Access Panels

 (3)
AMM 28-11-31/401, Center Tank Access Panel

 (4)
AMM 28-23-00/201, Defueling

 B.  Access
 (1)  Location Zones
 221 Center Section Fuel Tank
 305 Left Fuel Tank
 405 Right Fuel Tank

 C.  Procedure
 S 654-002
 WARNING: CAREFULLY DO ALL OF THE SAFETY PROCEDURES TO DEFUEL THE
_______ APPLICABLE FUEL TANK. AN EXPLOSION, BAD INJURY TO PERSONS, AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (1) If it is necessary, defuel the applicable tank (AMM 28-23-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-15
 ALL  ú ú 01 Page 401 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 684-003
 WARNING: CAREFULLY DO ALL OF THE SAFETY PROCEDURES TO PREPARE TO GO INTO
_______ THE FUEL TANK. AN EXPLOSION, BAD INJURY TO PERSONS, AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (2)
Prepare to go into the applicable tank (AMM 28-10-00/201).

 S 014-004

 (3)  
Remove the applicable access panel for the fuel tank (AMM 28-11-11/401, AMM 28-11-31/401).

 S 014-006

 (4)  
Go into the applicable tank.

 S 034-007

 (5)  
If bonding jumpers are installed on the couplings, disconnect them.

 (a)  Keep the jumper clamps for the task to install the fuel line.
 S 034-008
 (6)  Do these steps to disconnect the fuel line:
 (a)  
Loosen the nuts at the couplings.

 (b)  
Disconnect the fuel line clamps from the airplane structure.

 (c)  
Remove the fuel line and the clamps.

 (d)  
Identify the shims or spacers for the task to install the fuel line.

 (e)  
Discard the O-rings in the couplings.

 (f)  
　
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