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Refer to figure.
The figure depicts a fuel plan as created by a flight planning tool for a return flight LFPG-EIDW-LFPG. During the pre-flight preparations, the Operations Department calls the pilot and advises him/her to refuel at LFPG, due to some fuel-supply issues at EIDW. In order to reduce the environmental impact, the pilot will consider the least possible fuel tankering. What is the MINIMUM amount of fuel tankering to ensure the target fuel for EIDW-LFPG remains on board after landing at EIDW?
  • A
    5506 kg
  • B
    4432 kg
  • C
    7526 kg
  • D
    3495 kg

Refer to figure.
The Minimum Block Fuel that is required at EIDW to return to LFPG is: 7 100 kg.

We will assume that trip, contingency* and taxi fuel will be burnt: 230 kg + 2 933 kg + 157 kg = 3 320 kg.

* We should assume contingency is burnt, because if we do use it, we will below minimum block fuel for the return.

For the flight LFPG-EIDW, the crew have loaded a total of 5 226 kg. This means they will land at EIDW with 1 906 kg onboard (after burning taxi, contingency and trip fuel).

For the flight back (EIDW - LFPG), the crew needs a minimum block fuel of 7 100 kg. Therefore, at LFPG, they should load 7 100 kg - 1 906 kg = 5 194 kg extra.

However, carrying more fuel, adds weight to the aircraft and increases the fuel consumption. So, the fuel penalty from LFPG to EIDW must be applied. For every weight change per 1 000 kg, add 60 Kg to the Total fuel: 5 194 kg / 1 000 x 60 kg = 312 kg.

Therefore, the Minimum fuel amount that must be tankered, after applying the Fuel Penalty at LFPG must be: 5 194 kg + 312 kg = 5 506 kg.

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