Which component is responsible for regulating fuel flow in the APU?

The fuel control unit is essential for regulating fuel flow in the APU. Its primary function is to manage the amount of fuel delivered to the combustion chamber based on various parameters such as power demands and operational conditions. This unit ensures that the APU operates efficiently and provides the necessary power for starting the main engines and supplying electrical and pneumatic power on the aircraft.

By maintaining the proper fuel flow, the fuel control unit helps to achieve optimal combustion, which is crucial for the reliable and effective operation of the APU. This ensures that the APU can start quickly and maintain a stable performance during its operation, contributing to the overall effectiveness of the aircraft's auxiliary power systems.