What governs ongoing airworthiness obligations that might affect the validity of an airworthiness certificate?

• A. Random pilot inspections
• B. Adherence to marketing materials
• C. No obligations after initial certification
• D. Adherence to airworthiness directives and periodic inspections

Answer: (D)

Adherence to airworthiness directives and periodic inspections governs ongoing airworthiness obligations that might affect the validity of an airworthiness certificate. Airworthiness directives are mandatory notices from the aviation authority identifying unsafe conditions and requiring corrective actions within a specified timeframe, so the aircraft remains compliant. Periodic inspections, such as annual or 100-hour inspections as appropriate for the operation, verify that the aircraft still meets safety standards and that maintenance is up to date. If these obligations aren’t met, the aircraft can be considered unairworthy and the certificate can be invalid or the aircraft grounded. In contrast, random pilot inspections aren’t a formal ongoing requirement, marketing materials have no bearing on airworthiness, and there are indeed obligations after initial certification.