Who determines the maintenance intervals for turbine engine lubrication systems?

The maintenance intervals for turbine engine lubrication systems are determined by the engine manufacturer. This is because the manufacturer is responsible for designing the engine and its components, including the lubrication system. They conduct extensive testing and research to determine how often maintenance should be performed to ensure optimal performance and reliability. The manufacturer's specifications are based on various factors, including operating conditions, engine design, and materials used, which lead to the establishment of guidelines for lubrication intervals. Following these recommendations ensures that the engine operates efficiently and safely, minimizing the risk of failure due to inadequate lubrication.

The FAA does provide regulations and oversight, but it does not specifically set the maintenance intervals for individual engine types; rather, it ensures that manufacturers follow safety standards. While pilots and aircraft mechanics play essential roles in the operation and upkeep of the aircraft, they rely on the manufacturer's guidelines for maintenance schedules.