How are the slats/flaps affected if one SFCC fails?

When one Slat/Flap Control Computer (SFCC) fails, the system is designed to maintain functionality while adapting to the failure. The correct answer states that all flaps and slats operate at half speed, which reflects the redundancy built into the A320's flight control systems.

In an A320, the slats and flaps are controlled by two SFCCs, providing an inherent level of redundancy. If one SFCC fails, the remaining functioning SFCC takes over the control of both the slats and flaps. However, to ensure the system doesn't overreach or exceed its safety parameters during this operational reduction, the flap and slat movement speeds are halved.

This halved speed allows the aircraft to continue its operation with a single controller for flaps and slats while ensuring that system limitations are adhered to, thus maintaining a safe margin in performance. This type of design is often implemented in modern aircraft systems to ensure reliability and safety, particularly in critical flight control operations.