NOTE:____Find which fuel tube or coupling needs to be replaced. Use the applicable steps to remove the fuel tube(s), coupling(s) or fuel line component(s).
S 034-035
(14)
Do these steps to remove the fuel line from the service disconnect. (View C).
(a)
Disconnect the main fuel supply hose from the the raceway coupling (AMM 71-00-02/401).
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747-400
MAINTENANCE MANUAL
(b) Remove the two screws, washers, and caps from the block in the service disconnect.
NOTE: Keep the fasteners, spacers and caps for the
____
installation.
S 034-036
(15)
Do these steps to remove the fuel tube(s):
(a)
Remove the lockwire from the coupling nuts.
(b)
LOCATIONS WITH SHROUDED COUPLINGS;
Do these steps to remove the shroud coupling body:
1) Disconnect the drain line from the union.
2) Remove the union and the O-ring.
NOTE: Keep the union and discard the O-ring.
____
3) Loosen the shroud coupling body from the coupling.
(c)
Loosen the coupling nuts as necessary for the applicable fuel tube.
(d)
Remove the bolts, washers, nuts, end caps, spacers, shims (where installed), that attach the clamp blocks to the nacelle strut structure (View I).
NOTE: Keep the fasteners, end caps, spacers, and shims for
____
the installation.
(e) Remove the bolts, washers, nuts, spacers, cushions, fillers and brackets from the fuel tube at the saddle clamp (View K).
NOTE: Keep the fasteners, cushions, fillers and brackets for
____
the installation.
(f)
Remove the fuel tube(s). 1) Discard the coupling O-rings and the retainer rings.
(16)
Install dust covers on all open fuel lines.
S 494-037
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 214-038
CAUTION:_______DO NOT REPAIR THE FUEL TUBES IN THE STRUT AREA. IF A FUEL TUBE HAS DAMAGE THAT IS NOT PERMITTED PER THE ENGINE FUEL LINE DENT CRITERIA (AMM 28-22-07/601) YOU MUST REPLACE THE FUEL TUBE. A DAMAGED FUEL TUBE CAN LEAK WHICH CAN CAUSE A FIRE IN THE STRUT AREA.
(17) Inspect the fuel tubes and the coupling(s) for damage (AMM 28-22-07/601).
TASK 28-22-07-404-039
5. Fuel Line - Engine Disconnect to the Wing Front Spar - Installation___________________________________________________________________
A. General
(1)
This task contains procedures to install the fuel line from the engine disconnect to the wing front spar.
(2)
Use this task to install the fuel line tube(s), coupling(s), O-ring(s) or fuel line component(s) in the engine strut area.
B.
Equipment
(1)
Bonding Meter (AMM 20-22-01/601)
C.
Consumable Materials
(1)
D00128 Petrolatum, VV-P-236
D.
References
(1)
AMM 28-00-00/201, Fuel System
(2)
AMM 20-11-14/701, Metal Surfaces
(3)
AMM 24-22-00/201, Manual Control
(4)
AMM 28-22-07/601, Engine Fuel Feed System Fuel Line
(5)
AMM 27-81-00/201, Leading Edge Flaps
(6)
AMM 54-53-00/201, Strut Drains and Sealant
(7)
AMM 54-62-00/201, Nacelle Strut Access Panels (Opening and Closing)
(8)
AMM 71-00-00/201, Power Plant
(9)
AMM 71-00-00/501, Power Plant
(10)
AMM 71-11-06/201, Core Cowl Panels
(11)
AMM 73-11-01/401, Fuel Pump
(12)
AMM 78-31-00/201, Thrust Reverser System
