Which of the following best describes where you would find the mandatory actions relating to aircraft safety problems addressed by ADs?

• A. Airworthiness Directives
• B. Advisory Circulars
• C. Flight Manuals
• D. Type Certificates

Answer: (A)

The mandatory actions tied to safety problems addressed by Airworthiness Directives are found in the Airworthiness Directives themselves. When a safety issue is identified, the aviation authority issues an AD to require specific actions—such as inspections, repairs, or modifications—and it sets the timing for when those actions must be completed. These directives are legally enforceable and take precedence over other documents.

Advisory Circulars are guidance and not mandatory. Flight Manuals contain procedures for operating the aircraft but do not prescribe legally required actions to address a safety defect unless the AD itself directs changes that are then reflected in the manual. Type Certificates cover the original design approval and don’t dictate ongoing corrective actions unless an AD updates or modifies that design.