Which component is responsible for delivering fuel pressure to the engines and APU?

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The component responsible for delivering fuel pressure to the engines and APU is the electrically powered boost pumps. These pumps ensure that the fuel is delivered at the required pressure and flow rate to the engines and Auxiliary Power Unit (APU), regardless of the fuel quantity in the tanks. The boost pumps are critical for starting the engines, especially during low fuel conditions when gravity alone may not provide adequate fuel flow.

They maintain consistent pressure and help to prevent any loss of fuel supply, which is essential for the safety and efficiency of the aircraft. Electrically powered systems offer reliability and responsiveness needed in aviation applications, particularly in conditions where manual operation or mechanical devices might not perform optimally.

In contrast, while manually operated valves can control fuel flow, they do not actively pressurize the fuel. Mechanically driven pumps, often found in some systems, aren't primarily the ones supplying fuel to the engines and APU in modern aircraft like the A320. Gravity feed systems may provide fuel in specific scenarios, but they lack the capability for pressurization required for engine operation in most situations, especially during takeoff and climb phases.

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