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A
747-400 MAINTENANCE MANUAL
 S 482-343
 WARNING: DO THE PROCEDURE IN AMM 27-51-00/201 TO DEACTIVATE THE TRAILING
_______ EDGE FLAPS. ACCIDENTAL OPERATION OF THE FLAPS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  Do the deactivation procedure for the trailing edge flaps (AMM 27-51-00/201).
 S 482-427
 WARNING: USE THE TAIL SUPPORT EQUIPMENT IF YOU CANNOT KEEP THE CENTER OF
_______ GRAVITY IN THE LIMITS GIVEN BY THE WEIGHT AND BALANCE MANUAL. IF THE AIRPLANE CENTER OF GRAVITY IS NOT IN THESE LIMITS, THE AFT END OF THE AIRPLANE CAN HIT THE GROUND. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (5)  Install the tail support equipment if you can not keep the airplane center of gravity in the limits given by the weight and balance manual (AMM 07-11-08/201).
 S 862-428
 CAUTION: MOVE ALL UNNECESSARY SUPPORT EQUIPMENT AWAY FROM THE AIRPLANE.
_______ POSSIBLE AIRPLANE CONTACT WITH SUPPORT EQUIPMENT CAN OCCUR. DURING THE FUEL TRANSFER OPERATION THE CHANGE IN FUEL LOAD CAUSES THE AIRPLANE PITCH AND ROLL ATTITUDE TO CHANGE. THIS CONDITION CAN CAUSE THE WINGS AND FUSELAGE TO MOVE UP OR DOWN. DURING WINDY OR SLIPPERY CONDITIONS ON THE RAMP, AN AFT CG CONDITION CAN CAUSE THE AIRPLANE TO WEATHERVANE AND THE NOSE OF THE AIRPLANE TO MOVE SIDEWAYS. THIS MOVEMENT CAN CAUSE THE AIRPLANE TO CONTACT SUPPORT EQUIPMENT.
 (6)  
Move all unnecessary support equipment and stands away from the airplane.

 S 862-345

 (7)  
Supply electrical power (AMM 24-22-00/201).

 (a)  
If you use the APU to supply electrical power, make sure the No. 2 and No. 3 main tanks each contain sufficient fuel to permit continuous operation of the APU during defueling (AMM 12-11-01/301).

 (b)  
If you cannot get power from the APU or an external source, you can do these steps to use the airplane battery: 1) Set the BATTERY switch on the electrical system control

 module, on the pilots' overhead panel, P5, to ON. 2) Set the STANDBY POWER knob on the electrical system control module, on the pilots' overhead panel, P5, to OFF. 3) Set the refuel power switch on the refuel control panel to BATTERY.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-346
 (8)  
Make sure the FUEL CONTROL switches on the control stand are in the CUTOFF position.

 (a)  
Attach DO-NOT-OPERATE tags to the switches.

 (b)  
Push the STAT button on the display select panel for the EICAS.

 (c)  
Make sure the auxiliary EICAS shows the status page.

 (d)  
Make sure no FUEL SPAR VLV status messages show.

 S 862-347
 WARNING: DO NOT OPEN THE JETTISON NOZZLE VALVE DURING THE FUEL TRANSFER
_______ OPERATION. MAKE SURE YOU OPEN THE JTSN NOZZLE VLV CONT L AND R CIRCUIT BREAKERS. IF THE CIRCUIT BREAKERS ARE NOT OPEN YOU CAN CAUSE A FUEL LEAK TO OCCUR. FUEL CAN FLOW FROM THE JETTISON NOZZLE WHICH CAN CAUSE A DANGEROUS CONDITION FOR EQUIPMENT AND PERSONS.
 (9)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P6 Main Power Distribution Panel
 1) 6C18 JTSN NOZZLE VLV CONT R
 2) 6D18 JTSN NOZZLE VLV CONT L

 

 S 012-376
 (10) AIRPLANES WITH A HYDROMECHANICAL SCAVENGE SYSTEM; Remove the fuel strainers (AMM 28-15-00/201).
 NOTE: Make a decision about fuel transfer from the CWT to the
____ inboard main tanks. If fuel transfer from the CWT to the inboard main tank is not desirable, then remove the fuel strainers. The fuel scavenge system is deactivated when you remove the fuel strainers.
 S 862-375
 (11) Do these steps to open the jettison transfer valves:
 NOTE: When you open the jettison transfer valves, the fuel transfer
____
 rate will greatly improve (SSM 28-00-01).

 (a)  These steps apply to the transfer of fuel from these tanks only: 1) Center wing tank
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