(a)  
Go into the No. 2 and 3 main tanks (AMM 28-11-00/201).

 (b)  
Remove the two G28019-3 clamps from the manifold drain valves (if installed).

 (c)  
Go out of and close the fuel tank(s) (AMM 28-11-00/201).

 (d)  
Install the access doors on the fuel tank(s)
 (AMM 28-11-02/401).

 S 086-274
 (2)
Remove the pressure test equipment, G28021, from the rear spar.

 S 426-275

 (3)  
Install the control switch for the APU boost pump
 (AMM 28-42-01/401).

 S 866-199

 (4)  
Put these valves to the CLOSED position (if opened):

 (a)  
FUEL CROSSFEED VALVE NO. 1

 (b)  
FUEL CROSSFEED VALVE NO. 2

 (c)  
FUEL CROSSFEED VALVE NO. 3

 (d)  
FUEL CROSSFEED VALVE NO. 4

 (e)  
Manual shutoff valves (two locations on each wing)

 (f)  
Manual defuel valves

 (g)  
Left CWT jettison transfer valve

 (h)  
Right CWT jettison transfer valve

 S 416-255
 (5)  AIRPLANES WITH A HYDROMECHANICAL SCAVENGE SYSTEM;
 Install the left and right scavenge system fuel strainers
 (AMM 28-15-00/201).

 S 086-256
 WARNING:_______DO THE PROCEDURE IN AMM 32-00-30/201 TO REMOVE THE LOCKS. THE DOORS MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (6)  Remove the wing and body gear door locks (AMM 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-07
 ALL  ú ú 01 Page 630 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 866-257
 (7)  Supply electrical power (AMM/24-22-00/201).
 S 086-258
 WARNING: MAKE SURE THAT PERSONS AND THE EQUIPMENT ARE CLEAR BEFORE YOU
_______ MOVE THE FLAP CONTROL LEVER. THE LEADING EDGE FLAPS, THE TRAILING EDGE FLAPS AND THE FLAP DRIVE MECHANISMS WILL MOVE. WITH HYDRAULIC POWER REMOVED, ELECTRICAL POWER WILL MOVE THE FLAPS AUTOMATICALLY WHEN YOU MOVE THE FLAP CONTROL LEVER.
 (8)  
Do the activation procedure for the leading edge flaps (AMM 27-81-00/201).

 S 656-259

 (9)
Do this task: Remove the Air from the Fuel System Manifolds.

 S 796-260

 (10)
 Check for leaks at the control pressure switch for the APU boost pump, S538, and any fuel tank access doors that were opened.

 TASK 28-22-07-606-297
 5.  Remove the Air from the Fuel System Manifolds______________________________________________
 A. General
 (1)  
Do this task to remove any trapped air and fill the fuel system manifolds with fuel.

 B.
References

 (1)  
AMM 12-11-01/301, Fuel Service

 (2)  
AMM 24-22-00/201, Manual Control

 C.
Access

 (1)  
Location Zones
 221 Control Cabin, Left
 222 Control Cabin, Right
 521 Leading Edge to Front Spar, Left
 621 Leading Edge to Front Spar, Right

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-07
 ALL  ú ú 01 Page 631 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  
Access Panels
 521BB Fueling Station Access Door
 521CB Fueling Control Panel Access Door
 621BB Fueling Station Access Door

 D.
Prepare the Airplane

 S 866-277
 (1)
Supply electrical power (AMM 24-22-00/201).

 S 866-278

 (2)
Make sure these tanks contain the minimum amount of fuel:

 (a)
MAIN 1 - 2800 lbs (1300 kgs)

 (b)
MAIN 2 - 15,000 lbs (6800 kgs)

 (c)
MAIN 3 - 15,000 lbs (6800 kgs)

 (d)
MAIN 4 - 2800 lbs (1300 kgs)

 S 656-279
 (3)
Refuel the airplane if necessary (AMM 12-11-01/301).
　
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