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 28-11-00
 ALL  ú ú 07 Page 646 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
L68325
A
747-400 MAINTENANCE MANUAL
 F.  Prepare the Fuel-Feed and Refuel/Jettison Manifolds for the Pressure Check
 NOTE: You must pressurize the fuel manifolds during the air pressure
____ check. The pressurized manifolds will prevent air leaks through the refuel valves.
 NOTE: Depressurize the fuel system manifolds when the fuel tank pressure
____
 test is not active.

 S 866-360
 (1)  Supply electrical power (AMM 24-22-00/201).
 S 866-361
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING
_______ EDGE AND TRAILING EDGE FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. WITH HYDRAULIC POWER REMOVED, THE FLAPS WILL MOVE AUTOMATICALLY BY ELECTRICAL POWER WHEN YOU MOVE THE FLAP CONTROL LEVER.
 (2)  Extend the leading edge flaps (AMM 27-81-00/201).
 S 046-362
 WARNING: DO THE PROCEDURE IN AMM 27-81-00/201 TO DEACTIVATE AND INSTALL
_______ LOCKS ON THE LEADING EDGE FLAPS. THE LEADING EDGE FLAPS MOVE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Do this task: Extended Leading Edge Flaps Deactivation and Safety Locks Installation (AMM 27-81-00/201).

 S 486-363

 (4)  
Install the G28018 air pressure check equipment at engine No. 1 fuel line disconnect (AMM 28-22-07/601).

 S 866-364

 (5)
Use the manual lever to put these valves to the OPEN position:

 (a)  
Engine No. 1 fuel spar valve (AMM 28-22-01/401).

 (b)  
Engine No. 1, 2, 3, and 4 crossfeed valves

 (c)
Left and right manual shutoff valves (refuel station)

 (d)  
Left and right defuel valves (refuel station).

 (6)  
Do these steps at the center wing tank rear spar:

 S 866-365
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-11-00
 ALL  ú ú 07 Page 647 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 046-366
 WARNING: DO THE PROCEDURE IN AMM 32-00-30/201 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (7)  
Install the door locks for the wing and body landing gear
 (AMM 32-00-30/201).

 S 016-367

 (8)  
AIRPLANES WITH A HYDROMECHANICAL FUEL SCAVENGE SYSTEM; Remove the fuel scavenge system fuel strainers (AMM 28-15-00/201).

 S 866-368

 (9)  
Make sure the manual lever for the APU shutoff valve is in the CLOSED position (AMM 28-25-02/401).

 G.
Prepare the Fuel Tanks for the Pressure Check Procedure (Table 601)

 S 486-369
 WARNING:_______ACCOUNT FOR ALL TOOLS AND ITEMS GOING INTO THE FUEL TANK. MAKE SURE ALL TOOLS HAVE ATTACHED "REMOVE BEFORE FLIGHT" FLAGS. IF YOU ACCIDENTLY LEAVE A TOOL OR PLUG ATTACHED TO THE VENT SYSTEM, DAMAGE TO THE WING STRUCTURE CAN OCCUR.
 (1)  Make a written record of all tooling or removed structure.
 S 656-286
 WARNING: CAREFULLY DO ALL THE SAFETY PROCEDURES TO DEFUEL AND TO GO INTO
_______ THE FUEL TANKS. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR IF YOU DO NOT OBEY THE SAFETY PROCEDURES.
 (2)
Obey all of the precautions for defueling and entering a fuel tank.

 S 656-287

 (3)  
Defuel the applicable fuel tanks (AMM 28-26-00/201).

 (4)
Purge and prepare to go into the fuel tanks (AMM 28-11-00/201).

 S 486-290

 (5)  
Install tooling on the refuel manifold drain valves (View L):

 (a)  
Go into the No. 2 and No. 3 main tanks through these access doors: 1) 544AB - No. 2 main tank 2) 644AB - No. 3 main tank

 (b)  
Go to the manifold drain valve on the refuel/jettison manifold (WS 353, BL 127).
　
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