What controls the fuel autobalance system in the PC-12?

The Fuel Control and Monitoring Unit (FCMU) plays a crucial role in managing the fuel autobalance system in the PC-12. It is responsible for monitoring and controlling the distribution of fuel between the left and right fuel tanks to ensure balanced fuel levels. This system is particularly important for aircraft stability and safety, as uneven fuel distribution can affect the aircraft’s center of gravity and handling characteristics.

The FCMU uses sensors to detect fuel levels in the tanks and automatically adjusts fuel flow to maintain balance while the aircraft is in flight. This function is especially vital in a single-engine aircraft like the PC-12 where performance and handling are critical.

Other components such as the Engine Control Unit (ECU) and the Main Control Unit (MCU) do have their specific roles in the aircraft's operation, but they do not directly control the fuel autobalance system. The ECU mainly focuses on managing the engine's operation, while the MCU may refer to other control tasks that are not specifically related to fuel balancing. Therefore, the FCMU is the designated unit that directly supervises the fuel autobalance process.