For how long must AD compliance records be maintained?

The requirement for maintaining Airworthiness Directive (AD) compliance records until the aircraft is sold is rooted in the need to ensure that all safety and compliance information is transferable to the new owner. This is crucial because an aircraft's safety status and compliance history can significantly impact its value and the ability to address any potential safety issues. When an aircraft is sold, it is essential for the new owner to have access to records that demonstrate all ADs have been properly complied with.

This practice guarantees that the new owner is aware of the maintenance history and any outstanding compliance requirements, which is vital for maintaining the aircraft's airworthiness and for regulatory purposes. Although records should be kept for safe operations, they must ultimately remain available for scrutiny or reassessment during the ownership transition process, culminating in their retention until the point of sale.