How long must the owner keep the technical log after an aircraft is destroyed?

The requirement for keeping the technical log after an aircraft is destroyed is crucial for maintaining proper aviation records and ensuring accountability within the aviation industry. The correct response indicates that the owner must retain the technical log until the aircraft is no longer registered. This is important because the log contains valuable historical maintenance and operational data that may be required for various legal, regulatory, or safety-related purposes, even after the aircraft has been destroyed.

Retaining the log until the cancellation of the registration ensures that all documented information is available for inspection or review if necessary, for up to the relevant part of the aircraft’s operational history. This requirement aligns with broader aviation safety and regulatory compliance objectives, emphasizing the importance of maintaining comprehensive records in all circumstances.

While alternatives may suggest varying timeframes for retention, they do not align with the regulatory expectation of keeping records until the aircraft's registration is officially terminated, which serves both legal and practical aviation standards. This ensures that all relevant data is preserved for potential investigations, audits, or future reference.