What is the disposition of the completed GACA Form 8320-1/FAA Form 337?

The correct answer is that one copy of the completed GACA Form 8320-1/FAA Form 337 goes to the aircraft owner, and one copy is submitted to the General Authority of Civil Aviation (GACA). This process ensures that the aircraft owner has a record of the modifications or repairs made, as documented in the form, which is crucial for maintenance and airworthiness records. Additionally, submitting a copy to GACA allows the regulatory authority to maintain oversight and documentation on the aircraft’s modifications, ensuring compliance with the relevant aviation regulations.

This system of distribution supports transparency and traceability in aircraft maintenance and ownership, which are vital components of aviation safety and regulatory compliance.