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A flight log excerpt gives the following planning data for a Commercial Air Transport Flight. What is the maximum allowed traffic load for this flight?

Maximum Take-Off Mass: 62 800 kg 
Maximum Landing Mass: 54 900 kg 
Maximum Zero Fuel Mass: 50 300 kg 
Performance-Limited Take-off Mass at Departure: 59 600 kg 
Performance-Limited Landing Mass at destination: 54 500 kg 
Dry Operating Mass: 34 750 kg 
Block Fuel: 10 810 kg 
Taxi Fuel: 150 kg 
Trip Fuel: 5800 kg 
Contingency Fuel: 290 kg 
Alternate Fuel: 850 kg 
Final Reserve Fuel: 3720 kg

  • A

    14 190 kg

  • B

    15 550 kg

  • C

    14 340 kg

  • D

    16 830 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:

  • Performance-Limited Take-off Mass at Departure = 59 600 kg
  • MZFM + (block fuel - taxi fuel) = 50 300 kg + (10 810 kg - 150 kg) = 60 960 kg
  • ​Performance Limited Landing Mass + trip fuel (as trip fuel will be consumed during the flight) = 54 500 kg + 5800 kg = 60 300 kg

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

OM = DOM + (Block Fuel - Taxi Fuel)
OM = 34 750 kg + (10 810 kg - 150 kg) = 45 410 kg

Allowed Traffic Load = TOM - OM
Allowed Traffic Load = 59 600 kg - 45 410 kg = 14 190 kg

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