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You’re at the gate, prepared for departure, with 30 minutes of discretionary fuel onboard. ATC then advises that due to a runway closure, taxi time will be increased by 15 minutes. What is the appropriate course of action in this situation?

  • A

    You can use discretionary fuel for the taxi and depart.

  • B

    You cannot depart and need to add more taxi fuel.

  • C

    You cannot depart because the contingency fuel is not enough to compensate for the taxi delay.

  • D

    You need to increase your final reserve fuel.

Important Note: There is a new definition of discretionay fuel in CAT.OP.MPA.181. It is defined as fuel "required by the commander" This update must be put into effect by March 31, 2026 at the latest. However we have no information about whether authorities have updated there database or not.

Discretionary fuel is defined as ‘required by the commander’ (PIC). The commander’s discretion over the amount of fuel to be carried is independent and cannot be encouraged or discouraged.

Discretionary fuel is intended to cover circumstances based capatain experience such as longer taxi times, holding, or weather deviations. In this case, the 15-minute taxi delay can be absorbed by the 30 minutes of discretionary fuel, so no additional fuel uplift is required, and you may depart as planned.

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