High-lift control devices, such as trailing-edge flaps, serve an important role in any kind of aircraft mission profile, despite their duty cycle constituting only a small portion of the whole flight. The phases that usually require their deployment are take-off and approach and landing, during which the aircraft operates at low altitudes and reduced airspeeds. Therefore any failure in their operation that may affect maneuverability and controllability should be avoided, since it might cause a catastrophic event. The most concerning failure condition in the actuation of the flaps is an asymmetric deployment, as it generates a rolling moment that the autopilot has to compensate for by engaging the ailerons.