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Given the following fuel masses, calculated by the pilot of a light aircraft with the following mass limitations, according to the Limitation section of the Aircraft Flight Manual, what is the maximum traffic load for this flight?

Block Fuel: 890 kg
Trip Fuel: 480 kg
Taxi Fuel: 25 kg

Maximum Structural Take-Off Mass: 5800 kg
Performance-Limited Take-Off Mass: 5650 kg
Performance-Limited Landing Mass: 4700 kg
Today's Flight Dry Operating Mass: 2970 kg

  • A

    1965 kg

  • B
    865 kg
  • C
    1815 kg
  • D

    1345 kg

Traffic Load (TL) is the difference between the actual take-off mass and the Operating Mass (OM). Operating Mass (OM) = DOM + Fuel (but without the Traffic Load)

(1) Maximum allowed Take-off Mass must be calculated. It is the lowest of:

  • Maximum Structural Take-Off Mass: 5800 kg
  • Performance-Limited Take-off Mass: 5650 kg
  • ​Performance-Limited Landing Mass + Trip fuel (as trip fuel will be consumed during the flight) = 4700 kg + 480 kg = 5180 kg

(2) Maximum Allowed Traffic Load = Maximum Allowed TOM - OM:

OM = DOM + (Block Fuel - Taxi Fuel)
OM = 2970 kg + (890 kg - 25 kg) = 3835 kg

Allowed Traffic Load = 5180 kg - 3835 kg = 1345 kg

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