Which four elements does the flight control system monitor?

• A. Pilot inputs, sensors, controller, actuators
• B. Altitude, airspeed, heading, attitude
• C. Engine temperature, fuel level, RPM, oil pressure
• D. GPS, IMU, magnetometer, barometer

Answer: (A)

At the core, a flight control system runs a closed loop that continuously watches four elements. Pilot inputs provide the desired maneuver. Sensors give real-time state information such as orientation and motion. The controller processes that information and determines corrective commands. Actuators carry out those commands by moving the motors or control surfaces. The system relies on monitoring and coordinating these four parts to maintain stable flight; the other options describe flight data or separate subsystems rather than the components the flight control system actively monitors and coordinates.