(3)
To find the permitted lateral fuel imbalance, refer to Figure 203 to get the permitted lateral imbalance and Figure 204 to get the contribution of each wing tank to the lateral fuel imbalance. Figure 205 gives the general fuel imbalance limits.
S 652-235
(4)
To defuel one fuel tank, use the subsequent limits to prevent fuel
imbalance. ~.................................................................... | Tank to Be Defueled | Airplane Gross Weight Limits | ...................................................................... | Main Tank 1 or 4 | At an airplane gross weight less | | | than 805,000 pounds (365,909 | | | kilograms). | ...................................................................... | Main Tank 2 or 3 | At an airplane gross weight less | | | than 750,000 pounds (340,909 | | | kilograms). | ...................................................................... | Reserve Tank 2 or 3 | At all airplane gross weights. | 2.........................…..........................................1
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747-400 MAINTENANCE MANUAL
2.8 873000 MTW 15.0
875000
850000
825000
800000
775000
750000
725000
700000
675000
650000
625000
600000
575000
550000
525000
GROSS WEIGHT (LB.)
5 25
1
NOSE GEAR: MAIN GEAR: MINIMUM OF 49 X 17/32 PLY RATING TIRE REQUIRED (50400 LB. RATED LOAD) MINIMUM OF H49 X 19-22/32 PLY RATING TIRE REQUIRED (56600 LB. RATED LOAD)
1
THIS GRAPH GIVES GENERAL LATERAL IMBALANCE LIMITS FOR STATIC MAINTENANCE OPERATIONS
ONLY. FOR FLIGHT OPERATIONS AND MORE DATA ON GROUND MAINTENANCE OPERATIONS,
REFER TO THE APPLICABLE WEIGHT AND BALANCE MANUAL.
Gross Weight/Lateral Imbalance Figure 203
C22530
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747-400 MAINTENANCE MANUAL
25
IMBALANCE X 1000000 IN-LB
20
15
10
5
0
0 10000 20000 30000 40000 60000 70000 80000 90000
FUEL IN TANK IN POUNDS
1
THIS GRAPH GIVES GENERAL LATERAL IMBALANCE LIMITS FOR STATIC MAINTENANCE OPERATIONS
ONLY. FOR FLIGHT OPERATIONS AND MORE DATA ON GROUND MAINTENANCE OPERATIONS,
REFER TO THE APPLICABLE WEIGHT AND BALANCE MANUAL.
Imbalance/Fuel in Tank Figure 204
C22543
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747-400
MAINTENANCE MANUAL
FUEL WEIGHT IN POUNDS
14000 13000 12000 11000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 0
AIRPLANE GROSS WEIGHT IN POUNDS
1
THIS GRAPH GIVES GENERAL LATERAL IMBALANCE LIMITS FOR STATIC MAINTENANCE OPERATIONS
ONLY. FOR FLIGHT OPERATIONS AND MORE DATA ON GROUND MAINTENANCE OPERATIONS,
REFER TO THE APPLICABLE WEIGHT AND BALANCE MANUAL.
Fuel Weight/Airplane Gross Weight Figure 205
C22552
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747-400 MAINTENANCE MANUAL
S 652-236
(5) To defuel all the fuel tanks in one wing, use the subsequent limits
to prevent fuel imbalance. ~.................................................................... | Tank to Be Defueled | Limits | ......................................................................
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