What is the minimum fuel dump requirement for aircraft?

The average rate of fuel jettison must be at least 1 percent of the maximum weight per minute, except that the total time required to jettison the amount of fuel to reduce the aircraft weight from maximum takeoff to maximum landing need not be less than 10 minutes.



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IFR Fuel Requirements: Complete the flight to the first airport of intended landing; Fly from that airport to the alternate airport; and. Fly after that for 45 minutes at normal cruising speed or, for helicopters, fly after that for 30 minutes at normal cruising speed.

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In the event of an emergency requiring a return to the departure airport, the aircraft circles nearby in order to consume fuel to get down to within the maximum structural landing weight limit, or, if the situation demands, simply land overweight without delay.

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It would seem strange that pilots would purposefully dump fuel from their aircraft at a time when fuel prices have skyrocketed. What's more bizarre is that they do it in the air while flying. Tossing fuel into the air is a safe procedure for a good reason. Additionally, it is not as wasteful as it seems.

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The fuel flow rate for gravity systems (main and reserve supply) must be 150 percent of the takeoff fuel consumption of the engine.

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