What does the Fuel Control Unit (FCU) respond to during normal operations?

The Fuel Control Unit (FCU) is an essential component of the aircraft's engine management system that regulates the fuel flow to the engine based on specific inputs. In normal operations, the FCU primarily responds to movements of the Power Control Lever (PCL) and the Conditions Lever.

The PCL is used to control the engine's power output and directly impacts the fuel flow, while the Conditions Lever sets the engine operating mode, influencing how the FCU adjusts the fuel delivery according to different flight phases or engine conditions. This combination allows for precise control over engine performance and efficiency, ensuring that the correct amount of fuel is supplied based on pilot inputs and operational demands.

Understanding the role of the PCL and Conditions Lever is crucial for effective engine management and achieving optimal performance of the Pilatus PC-12 NG during various phases of flight.