If an engine has been rebuilt and documented accordingly, what type of documentation might you find?

When an engine has been rebuilt, the proper documentation is critical for both regulatory compliance and maintenance records. The correct answer encompasses two key types of documentation: FAA Form 337 and a new engine logbook.

FAA Form 337 is a mandatory document used to report major repairs and alterations to the Federal Aviation Administration (FAA). This form provides a clear record of the work performed, ensuring that the rebuild complies with all FAA regulations and standards. It serves as official documentation that the engine has undergone significant work and details the specifics of the alterations, including any inspections conducted.

Additionally, a new engine logbook is essential for ongoing record-keeping. This logbook will contain detailed entries regarding the rebuilt engine's maintenance history, operating times, and significant events or repairs that occur after the rebuild. This ensures that future technicians and inspectors have access to a complete and accurate history of the engine's status and maintenance.

Having these documents not only legitimizes the rebuild but also enhances the safety and reliability of the aircraft, as it ensures that all work has been properly assessed and documented in accordance with aviation regulations.