What aspect of maintenance can invalidate a Certificate of Airworthiness?

Failure to comply with Airworthiness Directives (ADs) is a significant factor that can invalidate a Certificate of Airworthiness. ADs are legally enforceable regulations issued by the aviation authority to address safety issues identified in aircraft, engines, and other components. When an aircraft owner does not comply with these directives, the aircraft may become unairworthy as it could be operating with potentially unsafe conditions that were outlined in the AD. This non-compliance can lead to increased risk in flight operations and ultimately raises safety concerns that compromise the integrity of the aircraft.

ADs are periodically updated, and it is the responsibility of the aircraft owner or operator to ensure that all applicable directives are followed. Non-compliance can result in serious consequences, including invalidating the Certificate of Airworthiness, fines, or even legal action.

The other options, while related to general maintenance practices, do not directly invalidate the Certificate of Airworthiness as strongly as non-compliance with ADs does. Pre-flight inspections and maintenance records are important for safety and operational integrity, but failing to complete these does not automatically invalidate the certificate. Therefore, while neglecting visual inspections and maintenance records can create safety risks and issues, they do not hold the same critical legal weight as not adhering to Airworthiness