Engine Fuel And Fuel Metering Systems Oral Practice Test

The lever position control input is what the engine control uses to decide how much fuel to meter. To do that accurately, the electronic engine control needs a direct, continuous measure of how far the power lever is moved. The power lever angle potentiometer sits on the power lever and turns the lever’s angle into an electrical signal that the EEC can read. This signal tells the control exactly how much thrust is being requested, so it can adjust fuel flow accordingly. The other devices have different roles: a hydromechanical fuel control is the older metering mechanism driven by hydraulic and mechanical inputs rather than a direct electronic lever-sensing signal; the electronic fuel control unit is the computer that processes inputs including the lever angle signal; and a venturi measures air flow, not lever position. So the sensor that senses the power lever angle is the power lever angle potentiometer.