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Just before closing the doors of the aircraft, you are asked if it is possible to accept a group of passengers re-booked from another flight. Knowing that your departure is take-off limited, determine the underload so that you can decide how many passengers to accept:

Allowed take off mass: 24 220 kg
Operating mass: 14 792 kg
Dry operating mas: 8693 kg
Actual traffic load: 2563 kg
Take off fuel: 6099 kg
Disregard changes in fuel due to increase in the total mass.

  • A

    12 964 kg

  • B

    9428 kg

  • C

    6865 kg

  • D
    766 kg

Underload. The difference between allowable load and current load (under-load = allowable traffic load - actual traffic load). This load can be added due to last-minute changes.
Underload = Allowed take-off mass - Operating Mass (OM) - Traffic Load (TL)

Operating Mass (OM): It is the DOM plus takeoff fuel but without traffic load.
OM = DOM + TOF

  • Underload = 24 220 kg - 14 792 kg - 2563 kg = 6865 kg

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