FAA Powerplant Written Practice Test

What is the FAA's responsibility regarding the TBO (Time Between Overhaul) number of an aircraft engine?

1. The FAA sets the TBO number

2. The FAA ensures the manufacturer has determined this number

3. The FAA reviews maintenance records

4. The FAA approves operational procedures

The correct answer is: The FAA ensures the manufacturer has determined this number

The FAA's responsibility regarding the TBO (Time Between Overhaul) number primarily involves ensuring that the manufacturer has determined this number. The TBO is essential for establishing maintenance schedules that optimize the safety and performance of aircraft engines. Manufacturers are required to gather extensive operational data and conduct thorough analyses to establish the appropriate TBO limits for their engines. This figure is based on various factors such as engine design, materials used, operational conditions, and historical maintenance records. The FAA ensures that this process of determining the TBO complies with regulatory standards, contributing to the overall safety management of aviation. While the FAA does get involved with reviewing maintenance records and may set regulations about operational procedures, its main role concerning TBO is focused on verifying that manufacturers have accurately established these critical numbers based on sound engineering principles and data.