?8450.A hydrauHc system operational check during ground runup of an aircraft indicates that the wing flaps cannot be lowered using the main hydraulic system, but can be lowered by using the emergency hand pump.Which is the most likely cause?
发布于 2021-02-18 22:10:12
【单选题】 A ?The flap selector valve has a severe internal leak. B ?The pressure accumulator is not supplying pressure to the system. C ?The fluid level in the reservoir is low.
