Airworthiness Directives are issued by whom and are they mandatory?

Airworthiness Directives are issued by whom and are they mandatory?

• A. Issued by FAA; optional
• B. Issued by the manufacturer; mandatory
• C. Issued by FAA; mandatory
• D. Issued by NTSB; recommended

Answer: (C)

Airworthiness Directives address unsafe conditions in aircraft, engines, propellers, or certain equipment and are legal requirements issued by the FAA. They are mandatory, not optional—once issued, operators must comply within the specified timeframe. An AD tells you exactly what must be done (inspection, modification, or replacement) and by when, with some ADs requiring immediate action in emergencies. They are published under 14 CFR Part 39 and appear in official FAA records, binding on all affected aircraft, engines, or components. Noncompliance can ground the aircraft or lead to enforcement actions.

Airworthiness Directives address unsafe conditions in aircraft, engines, propellers, or certain equipment and are legal requirements issued by the FAA. They are mandatory, not optional—once issued, operators must comply within the specified timeframe. An AD tells you exactly what must be done (inspection, modification, or replacement) and by when, with some ADs requiring immediate action in emergencies. They are published under 14 CFR Part 39 and appear in official FAA records, binding on all affected aircraft, engines, or components. Noncompliance can ground the aircraft or lead to enforcement actions.