Fuel control systems encompass the hydromechanical and electronic hardware that regulates fuel scheduling, flow metering, and engine power management across fixed-wing and rotary-wing platforms, covering full authority digital engine control (FADEC) units, hydromechanical metering units (HMUs), fuel control units (FCUs), and associated trim valves, servo mechanisms, and pressure-regulating components that govern fuel delivery in response to throttle demand, altitude, and engine parameters.
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