A helicopter is planned for a VFR flight from a helideck, located within a hostile environment in a major city, towards a heliport in a non-hostile environment. Before its departure, the passengers request to fly from a heliport in a non-hostile environment instead. Assuming that the trip fuel remains unchanged, how does the change of the departure point affect the total fuel required for the flight?
According to EASA AIR OPS - AMC1 CAT.OP.MPA.191(b)&(c) Fuel/energy scheme — fuel/energy planning and in-flight re-planning policy —helicopters:
PLANNING CRITERIA
(a) The pre-flight calculation of the required usable fuel to be carried on board should include the following:
(3) contingency fuel, which should be:
(i) for IFR flights, or for VFR flights in a hostile environment, 10% of the planned trip fuel; or
(ii) for VFR flights in a non-hostile environment, 5% of the planned trip fuel;
Initially, the VFR flight was planned from a helideck in a hostile environment, where the contingency fuel is 10% of the planned trip fuel. But later, the VFR flight was planned from a heliport in a non-hostile environment, where the contingency fuel is 5% of the planned trip fuel.
Therefore, this change of the departure point will decrease the total fuel required for the flight by 5% of the trip fuel.
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