(5)  
AMM 28-26-00/201, Defuel

 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

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

 D. Prepare the Airplane for a Manual Refuel Operation
 S 653-045
 WARNING:_______OBEY ALL THE FUEL SERVICING PRECAUTIONS. FAILURE TO OBEY THE PRECAUTIONS CAN CAUSE SERIOUS INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Read and obey the precautions in this task: Precautions and Limits for Fuel Servicing (AMM 12-11-01/301).
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747-400 MAINTENANCE MANUAL
 S 653-046
 (2)  Do this task: Prepare the Airplane for a Refuel Operation
 (AMM 12-11-01/301).

 S 483-047
 WARNING: USE THE TAIL SUPPORT EQUIPMENT IF YOU CANNOT KEEP THE CENTER OF
_______ GRAVITY IN THE LIMITS GIVEN IN THE WEIGHT AND BALANCE MANUAL (AMM 07-11-08/201). IF THE AIRPLANE CENTER OF GRAVITY IS NOT IN THESE LIMITS, THE AIRPLANE CAN TIP AND THE AFT END OF THE AIRPLANE CAN STRIKE THE GROUND.
 (3)  Install the Cargo and Fuel Loading Support if the center of gravity will be out of limits (AMM 07-11-08/201).
 E. Connect the Fueling Equipment
 S 653-048
 (1) Do the operator supplied procedures to position the fuel vehicle.
 S 483-049
 CAUTION: OBEY THE PRECAUTIONS IN AMM 20-41-01/201 FOR ATTACHMENT OF
_______ BONDING CABLES. AN ADEQUATE ELECTRICAL BOND MAY NOT EXIST IF THE BONDING CABLES ARE NOT INSTALLED AT APPROVED AIRPLANE GROUND CONNECTIONS. IF THE FUEL SERVICE EQUIPMENT AND AIRPLANE ARE NOT CORRECTLY BONDED, A FIRE OR EXPLOSION CAN OCCUR.
 (2)  
Connect a bonding cable from the fueling source to an approved electrical grounding or bonding connection on the airplane (AMM 20-41-01/201).

 S 013-050

 (3)  
Open the access doors, 521BB and 621BB, to get access to the refuel station.

 S 483-051

 (4)  
Connect the bonding cable attached to the refuel nozzle to an approved airplane electrical ground (AMM 20-41-01/201).

 NOTE: The bonding cable is not necessary if there is electrical
____ continuity between the fueling source and the fueling nozzle.
 S 653-052
 (5)  Connect the fuel hose to the refuel receptacle adapter:
 (a)  
Remove the refuel receptacle cap.

 (b)  
Make sure there are no fuel leaks.

 (c)  
Make sure the refuel receptacle adapter is clean and not damaged.

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747-400 MAINTENANCE MANUAL
 (d)  
Make sure the defuel lever is correctly positioned in the recess for the refuel receptacle adapter.

 (e)  
Connect the refuel nozzle to the refuel receptacle.

 (f)  
Repeat these steps for each fuel hose.

 S 653-053
 (6)  Put the manual handle for the FUELING SHUTOFF VALVE to the OPEN position (left and if necessary the right wing).
 F. Prepare the Refuel Control Panel, P42:
 S 013-054
 (1)  
Fully open access door 521CB.

 S 653-055

 (2)  
Make sure the panel floodlights come on.

 S 653-109

 (3)
Without ground power, put the POWER switch to the BATT position.

 S 653-059

 (4)  
Test the indicator lights:

 (a)  
Push the PRESS TO TEST indicators lights.

 (b)  
Make sure each light comes on when pushed.

 S 653-060
 (5)  Test the fuel quantity indicators:
　
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