When an unpressurized aircraft's static pressure system is leak checked to comply with the requirements of Section 91.411, what aircraft instrument may be used in lieu of a pitot-static system tester?1.Vertical speed indicator.2.Cabin altimeter.3.Altimeter.4.Cabin rate-of-change indicator.5.Airspeed indicator.
发布于 2021-02-18 21:49:41
【单选题】
A 1 or 5.
B 2 or 4.
C 3.
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