What is SFCC on Airbus A320? (Slat Flap Control Computer)

The Slat Flap Control Computer, or SFCC, is an essential component of the Airbus A320 aircraft that plays a crucial role in controlling the slats and flaps. These aerodynamic control surfaces are located on the leading and trailing edges of the wings and are primarily responsible for enhancing the aircraft’s lifting capabilities during different phases of flight, such as takeoff and landing.

The SFCC is a computerized system that receives inputs from various sensors and utilizes complex algorithms to actuate the slats and flaps accordingly. It ensures that the slats and flaps are extended and retracted at the appropriate times to optimize the aerodynamic performance of the aircraft, maintain stability, and ensure safe and controlled flight.

The Functionality of the Slat Flap Control Computer

The SFCC on the Airbus A320 is a sophisticated electronic device that performs several vital functions related to the control of the slats and flaps:

1. Control Signal Processing

The SFCC receives signals from various sensors, such as angle-of-attack sensors and airspeed sensors, which provide crucial information about the aircraft’s current flight conditions. It processes these signals and determines the appropriate position for the slats and flaps based on the aircraft’s speed, angle of attack, and other factors.

For example, during takeoff, the SFCC calculates the ideal position for the slats and flaps to generate maximum lift while maintaining stability. It ensures that the slats and flaps extend to the correct angles based on the aircraft’s airspeed and angle of attack. Similarly, during landing, the SFCC ensures that the slats and flaps are extended to provide enough lift at lower speeds, aiding in a controlled descent.

2. Actuator Control

The SFCC is responsible for sending control signals to the actuators that physically drive the movement of the slats and flaps. These actuators, typically hydraulic or electric, extend and retract the slats and flaps based on the commands received from the SFCC.

The SFCC continuously monitors the position of the slats and flaps through feedback sensors and adjusts the actuator commands accordingly to ensure precise control. It also incorporates built-in safety features to prevent unintended movement or malfunctions of the slats and flaps, further enhancing the overall reliability of the system.

3. System Monitoring and Fault Detection

Another critical function of the SFCC is system monitoring and fault detection. The SFCC continuously checks the integrity of the sensors, actuators, and other components involved in the slat and flap control system. It detects any anomalies or malfunctions and provides appropriate warnings or alerts to the flight crew.

Through its built-in diagnostic capabilities, the SFCC can identify specific faults or failures in the system, allowing for timely maintenance and troubleshooting. This proactive approach helps ensure the safe and reliable operation of the slat and flap control system and reduces the risk of in-flight incidents.

The Advantages of the Slat Flap Control Computer

The integration of the SFCC in the Airbus A320 aircraft brings several advantages:

1. Enhanced Performance: The SFCC’s precise control over the slats and flaps allows for optimized aerodynamic performance during different flight phases. This results in improved lift, reduced drag, and increased fuel efficiency.

2. Flight Safety: The SFCC’s continuous monitoring and fault detection capabilities contribute to enhanced flight safety. Any potential issues with the slat and flap control system can be identified and addressed promptly, reducing the risk of accidents or incidents.

3. Automated Operation: With the SFCC taking control of the slats and flaps, the flight crew can focus on other critical tasks during takeoff, landing, and other phases of flight. The automation provided by the SFCC simplifies the workload, ensuring smoother and more efficient operations.

Furthermore, the SFCC is designed for redundancy to enhance overall system reliability. In case of a failure in one SFCC, the remaining SFCCs can take over the control of the slats and flaps seamlessly, ensuring continued safe operation of the aircraft.


The Slat Flap Control Computer (SFCC) is a critical component of the Airbus A320 aircraft that plays a central role in controlling the slats and flaps. Its advanced functionalities, such as control signal processing, actuator control, and system monitoring, ensure optimal aerodynamic performance and flight safety.

The SFCC’s integration in the Airbus A320 brings numerous advantages, including enhanced performance, improved flight safety, and automated operation. With its redundancy capabilities, the SFCC provides an additional layer of reliability, ensuring the aircraft’s safe operation even in the event of single-component failures.

For More: What is RACC on Airbus A320? (Rotor Active Clearance Control)