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The following data applies to a planned flight.

Dry Operating Mass: 34900 kg
Performance limited Take-Off Mass: 66300 kg
Performance limited Landing Mass: 55200 kg
Maximum Zero Fuel Mass: 53070 kg
Fuel required at ramp: Taxi fuel: 400 kg
Trip fuel: 8600 kg Contingency fuel: 430 kg
Alternate fuel: 970 kg Final reserve fuel: 900 kg
Traffic load: 16600 kg

Fuel costs at the departure airfield are such that it is decided to load the maximum fuel quantity possible. The total fuel (ramp fuel) which may be safely loaded prior to departure is:

  • A
    13230 kg
  • B
    12700 kg
  • C
    15200 kg
  • D
    10730 kg

Refer to figure.

Maximum permitted Take Off Mass is the Lowest of:
1) PLTOM = 66 300 kg
2) PLLM + Trip fuel = 55 200 kg + 8 600 kg = 63 800 kg

  • The maximum allowed Take Off Mass is 63 800 kg because it is the lowest (PLLM Limited)
Maximum Take off fuel = MTOM - DOM - Traffic Load = 63 800 - 34 900 - 16 600 = 12 300 kg
=> 12 300 kg is the maximum take off fuel => We will burn 400 kg during taxi. Therefore, we can load 12 300 + 400 = 12 700 kg, and we will still take off with 12 300 kg

Alternatively, follow the steps described in the annex to calculate the underload (extra load that can be uplifted) aand thereafter, add it to the fuel which has already been loaded.
There is no need to consider the ZFM.
The underload is 1400 kg.

Total Ramp Fuel = Trip fuel + taxi fuel + contingency + alternate + holding + uplift

Total Ramp Fuel = 8600 + 400 + 430 + 970 + 900 + 1400
Total Ramp Fuel = 12700 kg

(In the real world the fuel uplift will increase trip fuel, contingency, alternate and holding fuel)

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