What is the purpose of an FAA Form 337 or GACA Form 8320-1?

The purpose of FAA Form 337, as well as GACA Form 8320-1, is specifically to record and document major repairs and major alterations made to an aircraft. This form is essential in ensuring that any significant changes or repairs are properly documented to maintain the safety and airworthiness of the aircraft.

When an aircraft undergoes major alterations or repairs, the FAA or GACA requires these changes to be reported using the appropriate form. This documentation serves multiple purposes: it assures regulatory compliance, maintains a clear maintenance history, enhances safety by ensuring that modifications are properly documented and reviewed, and assists in future resale or regulatory inspections of the aircraft. The form typically includes detailed descriptions of the work performed, the date of completion, and information about the individual or organization that performed the work.

Because of this specific functionality, other options do not align with the purpose of Form 337 or Form 8320-1. For example, requesting aircraft registration, filing a flight plan, or reporting accidents and incidents fall under different regulatory processes and forms, illustrating the distinct purpose of these documents in the realm of aviation maintenance and regulation.