Which component controls the operations of the fuel system?

• A. Dual-channel fuel system computer
• B. Hydromechanical fuel director
• C. Single-channel manual control unit
• D. Engine control module

Answer: (A)

The thing that actually governs how the fuel flows and is delivered is a dedicated fuel control computer that runs two independent channels. This dual-channel setup provides redundancy, so if one channel encounters a fault, the other can keep the system operating, which is crucial for reliability in fuel management. The computer takes data from various sensors—like pressure, temperature, and engine speed—and uses it to determine the right amount of fuel to meter and deliver, coordinating pumps, valves, and injectors to maintain the proper air-fuel mix and safe operation.

A hydromechanical fuel director uses purely mechanical means to meter fuel and isn’t as adaptable or fault-tolerant as an electronic controller. A single-channel manual control unit would rely on human input rather than automatic sensing and control, making it slower and less precise. The engine control module is a broader controller that handles multiple engine systems, not exclusively the fuel system, so it isn’t the best match for describing control of the fuel operations in a dedicated way.