S 866-280
(4)
Make sure the airplane is not completely full.
S 866-281
(5)
Put these valves to the OPEN position (left wing refuel station)
(a)
Manual shutoff valves
(b)
Manual defuel valve
S 866-282
(6) Put a refuel valve switch to the OPEN position (P42 Panel).
NOTE: Make sure the applicable tank is not completely full.
____
S 866-283
(7)
Make sure the flaps are not in the takeoff position.
E.
Remove the Air From the Fuel System Manifolds
S 656-284
(1)
Put these crossfeed valve switches to the ON position:
(a)
FUEL X FEED 1
(b)
FUEL X FEED 2
(c)
FUEL X FEED 3
(d)
FUEL X FEED 4
S 656-285
(2)
Put these boost pump switches to the ON position:
(a)
MAIN 1 FWD and AFT
(b)
MAIN 2 FWD and AFT
(c)
MAIN 3 FWD and AFT
(d)
MAIN 4 FWD and AFT
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747-400 MAINTENANCE MANUAL
S 656-286
(3)
Transfer a minium of 100 lbs (100 kgs).
S 656-294
(4)
Put the boost pump switches to the off position.
S 866-288
(5)
Put the crossfeed valve switches to the off position.
S 656-289
(6)
Put these override/jettison pump switches to the ON position:
(a)
OVRD 2 FWD and AFT
(b)
OVRD 3 FWD and AFT
S 656-290
(7)
Transfer a minimum of 100 lbs (100 kgs) of fuel.
S 656-292
(8)
Put the override/jettison pump switches to the off position.
F.
Put the Airlane Back to the Usual Condition
S 866-293
(1)
Put these valves to the CLOSED position:
(a)
Refuel valve switch
(b)
Manual shutoff valves
(c)
Manual defuel valve 1) Put lockwire on the defuel valve manual handle.
S 866-299
(2)
Close these fuel station access doors:
(a)
521BB, Fueling Station Door
(b)
521CB, Fueling Control Panel Door
S 866-295
(3) Remove the electrical power if it is not necessary for other tasks (AMM/24-22-00/201).
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747-400 MAINTENANCE MANUAL
ENGINE FUEL FEED SYSTEM FUEL LINE - REPAIRS
___________________________________________
TASK 28-22-07-308-001
1. Engine Fuel Feed System Fuel Line Repair________________________________________
A. General
(1) For the fuel line repair procedure, refer to AMM 20-11-05/801 and the OHM 28-00-10.
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747-400 MAINTENANCE MANUAL
WATER SCAVENGE EJECTOR PUMP - REMOVAL/INSTALLATION
__________________________________________________
1. General_______
A. This procedure contains instructions to remove and install a water scavenge ejector pump (referred to as an ejector pump in this procedure).
B. Ejector pumps are found near the boost pump inlet screens, installed at the inboard end of each main fuel tank.
C. Access to the ejector pumps is through the applicable fuel tank access doors found below the wing.
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