Who can approve a minor alteration they've performed for return to service?

The correct answer is that GACA certificated mechanics are authorized to approve a minor alteration they've performed for return to service. This is because GACA regulations stipulate that only those individuals who hold the necessary certification and training can sign off on maintenance tasks, ensuring that all work completed meets the required safety and regulatory standards.

Certificated mechanics have undergone extensive training and are knowledgeable about the specific requirements and regulations governing aircraft alterations and repairs. Their expertise provides a level of assurance that the alterations performed do not adversely affect the safety and airworthiness of the aircraft.

In contrast, aircraft owners are not trained to the same level as certificated mechanics, and non-certificated mechanics may lack the necessary qualifications to make safe and compliant decisions regarding aircraft maintenance. Inspectors from GACA have their own roles, which typically include overseeing compliance and safety rather than directly performing and approving minor alterations. Therefore, the regulations are set to ensure these decisions are made by qualified individuals capable of ensuring the aircraft's safe return to service.