Airworthiness Directive
What is airworthiness directive?
An Airworthiness Directive (AD) is a mandatory safety notice issued by the FAA to aircraft owners when a known problem must be fixed to keep the aircraft safe and legal to fly, and all compliance must be documented in the maintenance records.
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Related terms
- airplane flight manual
- airplane owner/information manual
- airspeed indicator
- airworthiness certificate
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- ALSF-1
- ALSF-2
- alternate static source