Which component of the fuel system is responsible for delivering a continuous supply of fuel during operation of the aircraft engine?

The main fuel pump is essential for delivering a continuous supply of fuel during the operation of an aircraft engine. Its primary function is to transfer fuel from the fuel tank to the engine at the required pressure and flow rate, ensuring that the combustion process operates efficiently and consistently. This pump maintains the necessary fuel flow regardless of changes in engine demand and altitude, making it crucial for engine performance.

While the fuel tank stores the fuel, and the fuel pressure regulator helps maintain optimal pressure within the system, these components do not actively deliver fuel to the engine. The fuel control unit is responsible for regulating the amount of fuel that enters the combustion chamber based on engine demands but still relies on the main fuel pump to supply consistent fuel flow. Therefore, the main fuel pump plays the most vital role in the overall supply of fuel during engine operation.