Who establishes the recommended operating time between overhauls of a turbine engine used in general aviation?

The recommended operating time between overhauls of a turbine engine used in general aviation is established by the manufacturer. This is primarily because manufacturers are responsible for the design and testing of their engines. They conduct extensive research and development to understand the engine's performance, reliability, and maintenance needs.

Through testing and operational experience, manufacturers determine the safe and effective intervals for maintenance, including overhauls. These recommendations are essential for ensuring safety, reliability, and performance standards in aviation.

While the FAA imposes regulations on aviation safety and may influence operational practices through guidance, it is the manufacturer's insights and data derived from their specific engines that dictate the recommended overhaul intervals. Operators and repair stations utilize these guidelines to maintain compliance and ensure the longevity and safety of the engines they manage.