FIELD: aviation.
SUBSTANCE: invention relates to a fluid evacuation mast drained for a flight propulsion unit in gondolas. Mast (16) fluid evacuation drained to a propulsion unit (10) comprises a cavity (30) for storing the drained fluid and at least one orifice (32) for discharging the fluid contained in the storage recess. Said mast comprises means (36, 38) for acquiring a pressure difference outside of the mast (16) and a member (40) of purging the storage cavity, said member being movable between a first closed position of the discharge port and a second release position of this orifice. Moreover, the member being configured to move from the first to the second position when said pressure differential is greater than or equal to a predetermined value.
EFFECT: system for retaining drainage fluids is maintained with no help of electronic engine management system or without pressure extraction from the engine system.
10 cl, 8 dwg
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