The ________ controls the supply of fuel to the engine through the fuel metering unit.

The ________ controls the supply of fuel to the engine through the fuel metering unit.

• A. EEC
• B. FADEC
• C. Throttle
• D. Injector

Answer: (B)

Fuel flow to the engine is controlled by FADEC, the engine’s full authority digital control. It takes the thrust demand from the pilot via the throttle position and combines it with a wide range of sensor data (temperatures, shaft speeds, pressure, altitude, etc.) to compute the exact amount of fuel the engine needs. The FADEC then sends commands to the fuel metering unit, which actually sets the fuel flow that reaches the injectors. The injectors are the devices that spray the metered fuel into the combustion chamber, but they don’t decide how much fuel to deliver—that decision is made by the FADEC through the fuel metering unit. The EEC is an older term for automated engine control, but on modern Airbus engines the FADEC handles this function. The throttle provides the input for thrust demand but doesn’t directly regulate fuel flow.

Fuel flow to the engine is controlled by FADEC, the engine’s full authority digital control. It takes the thrust demand from the pilot via the throttle position and combines it with a wide range of sensor data (temperatures, shaft speeds, pressure, altitude, etc.) to compute the exact amount of fuel the engine needs. The FADEC then sends commands to the fuel metering unit, which actually sets the fuel flow that reaches the injectors. The injectors are the devices that spray the metered fuel into the combustion chamber, but they don’t decide how much fuel to deliver—that decision is made by the FADEC through the fuel metering unit. The EEC is an older term for automated engine control, but on modern Airbus engines the FADEC handles this function. The throttle provides the input for thrust demand but doesn’t directly regulate fuel flow.