What is the primary purpose of an FAA Form 337?

The primary purpose of FAA Form 337 is to report maintenance and repairs performed on an aircraft. This form is essential for documenting major repairs and alterations, ensuring that all necessary information is recorded, which includes details about the work performed, the date it was completed, and compliance with FAA regulations. This documentation is critical for maintaining the safety and airworthiness of the aircraft, as it provides a clear history of modifications and maintenance work done, facilitating inspections and future maintenance tasks. Additionally, the information captured in Form 337 helps ensure that all repairs and alterations meet safety standards set by the FAA, thereby supporting regulatory compliance and operational safety in aviation.