S 863-042
(6)
Make sure these components are in the closed position (Fig. 303):
(a)
Wing pressure relief valves (4 locations)
(b)
Landing gear doors
S 483-043
WARNING:_______INSTALL THE LOCKS ON ALL EXTENDED LEADING EDGE FLAPS. THIS WILL PREVENT INJURY FROM AN ACCIDENTAL OPERATION OF THE FLAPS.
(7)
Do this task for extended leading edge flaps: Extended Leading Edge Flaps Deactivation and Safety Locks Installation (AMM 27-81-00/201).
S 483-044
(8)
Install the Cargo and Fuel Loading Support if the center of gravity will be out of limits (AMM 07-11-08/201).
S 863-045
(9)
Make sure the onboard fuel load is in a valid fuel distribution configuration (equivalent to after a flight operation).
(a) Transfer fuel if it is necessary (AMM 28-26-00/201).
E. Pressure Refuel Operation Procedures
S 653-047
(1) Do one of these pressure refuel operations:
(a)
Automatic Pressure Refueling (AMM 12-11-02/301)
(b)
Manual Pressure Refueling (AMM 12-11-03/301)
(c)
Center Wing Tank Refuel (AMM 12-11-05/301)
(d)
Alternate Refueling Procedures (AMM 12-11-06/301).
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747-400 MAINTENANCE MANUAL
TASK 12-11-01-603-068
4. Fuel Supply for APU Operation_____________________________
A. General
(1) Do this task if the APU will supply power during the refuel operation.
B. Reference
(1) AMM 49-11-00/201, Auxiliary Power Unit
C. Access
(1) Location Zones
223 Control Cabin, Left
224 Control Cabin, Right
D. APU Operation
S 863-058
(1)
Make sure the No. 2 and 3 main tanks each contain a minimum of 2800 lbs (1300 kgs) of fuel.
S 913-059
(2)
Operate the APU (AMM 49-11-00/201).
S 863-060
(3)
Make sure the APU is started and running before you begin the refuel operation.
S 863-062
(4)
Make sure the refuel operation is complete before you shutdown the APU.
TASK 12-11-01-603-064
5. Alternate Fuel Supply for APU Operation_______________________________________
A. General
(1)
Do this task to use a different (alternate) fuel tank to supply fuel to the APU.
(2)
AIRPLANES WITH A HYDROMECHANICAL SCAVENGE PUMP SYSTEM; If the inboard main tanks (MAIN 2 and 3) do not contain sufficient fuel, the outboard main tanks (MAIN 1 or 4) or the CWT can supply the APU with fuel.
B. Reference
(1)
AMM 49-11-00/201, Auxiliary Power Unit
(2)
Location Zones
225 Control Cabin, Left
226 Control Cabin, Right
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A
747-400 MAINTENANCE MANUAL
C. Alternate Fuel Supply For APU Operation
S 863-069
(1)
Make a decision about which fuel tank will supply the APU with fuel.
S 863-070
(2)
If the No. 1, 3 or 4 main tank will supply fuel, do these steps:
(a)
Make sure the fuel supply tank contains a minimum of 2800 lbs (1300 kgs) of fuel.
(b)
Open the No. 2 crossfeed valve.
(c)
Open the crossfeed valve for the fuel supply tank.
(d)
Operate a boost pump for the fuel supply tank.
(e)
Operate the APU (AMM 49-11-00/201).
(f)
Make sure the APU is started and running before you begin the refuel operation.
(g)
Make sure the refuel operation is complete before you shutdown the APU.
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