Which of the following is a function of the Fuel System Controller (FSC)?

• A. Controls pumps and valves to keep the system balanced
• B. Measures cabin altitude
• C. Monitors landing gear position
• D. Tracks pilot shift changes

Answer: (A)

The Fuel System Controller acts as the network hub for the aircraft’s fuel system, coordinating pumps and valves to keep fuel distribution balanced among the tanks. It uses data from tank sensors, fuel flow, and engine demands to decide which pumps to run and which valves to open or close. By transferring fuel between tanks and through crossfeed as needed, it maintains a balanced load and a favorable center of gravity, ensuring continuous engine feed and preventing fuel starvation during flight. The other descriptions refer to systems that aren’t part of fuel management—cabin altitude relates to pressurization, landing gear position to the landing gear system, and pilot shift changes aren’t a function of the fuel system. So, controlling pumps and valves to keep the system balanced best captures what the FSC does.