Which function does the PMU NOT perform?

The PMU, or Power Management Unit, is responsible for various critical functions in the aircraft’s engine management system. Among its functions, it does indeed control and regulate fuel flow, determine available power based on flight conditions, and process power requests to ensure optimal engine performance.

The function of controlling the engine start sequence is not performed by the PMU. Engine start sequences are typically managed by other systems within the aircraft that are specifically designed for that purpose. This distinction is important as it highlights how the PMU focuses more on engine operation during flight rather than the initial engine start-up phase, which has its dedicated protocols and systems. Understanding the specific roles of the PMU helps in recognizing how it integrates with other components for overall aircraft performance.