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28-22-07
ALL ú ú 04 Page 617 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
A-A
Test Equipment Set-up Figure 603 (Sheet 2)
M03169
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-07
ALL ú
ú 04 Page 618
ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-07
ALL ú ú 06 Page 619 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
REFUEL
CROSSFEEDBOOST PUMP ENG 3 RECEPTACLES
ENG 2 MANUAL MANIFOLD BYPASS CHECK MANUAL
DEFUEL VALVE
FUEL-FEED DEFUEL ENG 1
CROSSFEED
VALVE
CROSSFLOW VALVE
MANIFOLD VALVE ENG 4
REFUEL VALVE MANUALRECEPTACLES
SHUTOFF VALVE
SPARCROSSFEED VALVES
VALVE
CENTER
MANUAL
TANK
SHUTOFF
CROSSFEEDVALVES
VALVE
CWTBYPASS
BOOST PUMPINTERCONNECT SPAR MAINMANIFOLDVALVE
CHECK VALVE
TANK 4 CROSSFEEDVALVE
MAINTANK 2
MAIN
FF
TANK 3 JETTISONJETTISON
SPAR
SPAR VALVE
FS FS
TRANSFER TRANSFER VALVE SURGE
RESERVE
VALVE VALVE TANK
TANK 3 SURGERESERVEMAINREFUELTANK TANK 2 TANK 1 MANIFOLD
DRAIN
VALVE
APUPUMP JETTISON
TO APU
APU TRANSFER SHUTOFF VALVES VALVE REFUEL
AIR PRESSURE
BOOST PUMP
MANIFOLD
TEST EQUIPMENT
JETTISONBYPASS
DRAIN
SET-UP REFUEL
NOZZLECHECK VALVE
VALVE
JETTISON
VALVE
BOOST PUMP
MANIFOLDBYPASSCHECK VALVE JETTISONNOZZLEVALVE
LEGEND:BOOST PUMP FUEL OUTLET REFUEL JETTISON MANIFOLDCHECK VALVE
MANUAL VALVE REFUEL RECEPTACLE
F
CROSSFLOW VALVE MOTOR CONTROLLED VALVE REFUEL VALVE
FUEL SCAVENGE SYSTEM SCREEN FS
OVERRIDE/JETTISON PUMP SECONDARY REFUEL VALVEFUEL INLET
Fuel-Feed and Refuel/Jettison Manifold Flow Diagram
Figure 604
M04869
A
747-400
MAINTENANCE MANUAL
A. General
(1)
This task does an air pressure leak check of these fuel system manifolds:
(a)
Engine fuel-feed manifold
(b)
Refuel/jettison manifold
(c)
Center Wing Tank (CWT) interconnect manifold
(2)
This task does not check the engine fuel-feed manifold from the spar valve to the fuel pump on the engine.
(3)
The control pressure switch for the APU boost pump, S538, is connected to the fuel-feed manifold via a sense line forward of the MAIN 2 aft boost pump. When you remove the pressure switch and install the test equipment you can pressurize the engine fuel-feed manifold.
(4)
A leak check of the refuel manifold can be accomplished by opening the defuel and shutoff valves at the pressure refuel stations. To do a check of the refuel/jettison manifold you must do a tank entry and install pressure test clamps on the M2/M3 refuel manifold drain valves.
(5)
A leak check of the CWT interconnect manifold can be accomplished by pressurizing the refuel/jettison manifold and opening the CWT jettison transfer valves.
B.
Equipment
(1)
Air Pressure Source - 40 psig capacity
(2)
Container - suitable to collect fuel
(3)
G28019-3 Screw Clamp Assembly
(4)
G28021 Fuel Manifold Test Equipment
C.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-81-00/201, Leading Edge Flaps
(3)
AMM 28-00-00/201, Fuel System
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