The following data for a flight of a twin engine jet aircraft are provided for the calculation:
Maximum landing mass = 51 300 kg
Maximum allowable take off mass = 56 300 kg
Dry operating mass = 29 100 kg
Load = 11 700 kg
Trip fuel = 3000 kg
Cont. fuel = 215 kg
Final reserve fuel = 1250 kg
Alternate fuel = 1300 kg
Taxi fuel = 200 kg
Determine the maximum possible extra fuel that can be uplifted for this flight.
ZFM = DOM 29 100 kg + load 11 700 kg = 40 800 kg
Take-off Fuel (TOF) = TF 3000 kg + CF 215 kg + FR 1250 kg + AF 1300 kg = 5765 kg
TOM = ZFM 40 800 kg + TOF 5765 kg = 46 565 kg
Maximum landing mass 51 300 kg + TF 3000 kg = 54 300 kg (this mass must not be exceeded!)
54 300 kg is lower than the maximum allowable TOM of 56 300 kg, therefore 54 300 kg is limiting.
Possible extra fuel = 54 300 kg - 46 565 kg = 7735 kg
Note : Don't forget that the taxi fuel is not part of the take-off fuel! The take-off fuel is the fuel contained at the beginning of the take-off (on the runway). At this location, taxi fuel has already been burned off. If you add the taxi fuel, your result would be 7535 kg (one of the wrong answers).
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