What function is NOT performed by the PMU?

The PMU, or Power Management Unit, plays several critical roles in managing the aircraft's engine and propeller systems. It is primarily responsible for controlling engine operations, maintaining operating limits to ensure safety and performance, and processing power requests based on the aircraft's needs.

The function that is not performed by the PMU is regulating fuel type. Fuel type regulation is typically handled through separate systems within the aircraft that are focused on fuel management and compatibility with the engine design. The PMU does not determine which type of fuel can be used; instead, it manages the operational parameters of the engine when an appropriate fuel type is present. This distinction emphasizes the PMU's role in real-time engine management rather than the selection or regulation of fuel types.