What does FAA Form 337 relate to?

FAA Form 337 is specifically used for documenting major repairs and alterations made to an aircraft. This form serves as a record of modifications or repairs that significantly affect the aircraft's operation, safety, or structure. It must be filled out by a certificated mechanic or repair station, detailing the work performed, and is essential for ensuring that any major changes comply with applicable regulations and standards set forth by the FAA.

The documentation is crucial for maintaining the aircraft’s airworthiness and for future reference in inspections and potential resale. This form not only helps maintain compliance with regulatory requirements but also creates a documented history of the maintenance of the aircraft, which is an important aspect of aircraft ownership and maintenance tracking.

Understanding this function is vital for aircraft owners, operators, and maintenance personnel, as it highlights the importance of proper record-keeping and adherence to safety standards in aviation.