FAA regulations (FAR 91.411 and 91.413) mandate periodic recertification of pitot-static systems (for IFR operations) and transponders (for all aircraft), separate from annual inspections. These ...
One pitot/static failure mode, involves a blocked pitot tube but an open drain hole. In this scenario, the airspeed indicator shows zero, since the rest of the system is open to static pressure. As ...
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