S 434-015
(5)
Tighten the bolts that attach the fuel tube clamps to the support brackets.
S 214-016
(6)
Do a check of the minimum clearance between the fuel tube and the structure:
NOTE: The supported area of a tube is defined as the section of
____ the tube that is within three inches of a bulkhead nut that attaches the tube to a rigid piece of equipment.
~............................................................ | BETWEEN THE FUEL LINE AND ADJACENT STRUCTURE | .............................................................. | 0.20 INCH | At locations that are not supported | .............................................................. | 0.10 INCH | At locations that are supported (or the | | | thickness of the supported clamps when the | | | fuel tubing is clamped directly to the | | | structure) | 2.............…..............................................1
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A
747-400 MAINTENANCE MANUAL
S 434-018
(7)
Do these steps to install the bonding clamps and bonding jumpers:
(a)
Solvent wipe the fuel tube(s) at the locations where the clamps and bonding jumpers are installed (SWPM 20-20-00).
NOTE: Do not apply any type of coating to the fuel tubes,
____ couplings or clamps.
(b)
Hold the bonding clamps on the fuel tube(s).
(c)
Attach the bonding jumper to the bonding clamp with the bolt, washers, and nut (SWPM 20-20-00).
(d)
Make sure the bonding jumper does not contact the fuel quantity units.
NOTE: If necessary, re-position the bonding clamp to a
____ different position to remove unwanted slack from the bonding jumper.
(e) Do a check of the bonding resistance between the fuel tube(s) and the airplane structure (SWPM 20-20-00).
NOTE: The resistance must not be more than 0.010 ohm.
____
S 794-019
(8) Do a check of the fuel lines for the engine fuel-feed system for leakage (AMM 28-22-07/601).
S 434-020
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 (AMM 28-00-00/201).
S 864-021
(10)
Go out of the fuel tank(s) and install the access panels (AMM 28-11-00/201).
TASK 28-22-07-004-022
4. Fuel Line - Engine Disconnect to the Forward Wing Spar Removal
______________________________________________________________
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
INBOARD STRUT
SEE C
OUTBOARD STRUT
FUEL PUMP FUEL PUMP SEE B
LOCATION LOCATION FUEL PUMP
SEE A SEE A DRAIN PLUGS
SEE D
WING LEADING
EDGE COVER 482CR 452CR 482BR FUEL PUMP LOCATION
452BR A
482AR
452AR
OUTBOARD STRUT
(RIGHT SIDE IS SHOWN) WING LEADING
EDGE COVER 471FR
B 462FR 472CR 472BR
462CR 462BR
472AR
462AR
MAIN FUEL
SUPPLY LINE
INBOARD STRUT
(RIGHT SIDE IS SHOWN)
PLUG
FUEL PUMP PACKING C
MAIN FUEL
SUPPLY FLANGE
FUEL PUMP DRAIN PLUG 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 燃油 FUEL 3(6)
