Mechanical flight control actuator for an aircraft

A mechanical flight control actuator intended to provide assistance to means for piloting an aircraft, said flight actuator comprising:

• a first electric motor;
• an input shaft adapted to be set into rotation by the first electric motor, said input shaft comprising an input clutch device, said input clutch device having an active position, wherein it is capable of coupling the input shaft with an output shaft via an intermediate shaft, and an inactive position;
• the output shaft being capable of being connected to the means for piloting the aircraft, said output shaft being adapted to be coupled with the input shaft when the input clutch device is in the active position;
• wherein said actuator comprises:
• a second electric motor;
• a backup assist shaft, said backup assist shaft being adapted to be set into rotation by the second electric motor, said backup assist shaft comprising a backup assist clutch device, said backup assist clutch device being jointly electrically controlled by the same signal with the input clutch and being capable of assuming an active position, wherein the backup assist shaft drives the output shaft, and an inactive position, and in that the backup assist clutch device is in its active position when the input clutch device is in its inactive position and said backup assist clutch device is in its inactive position when the input clutch device is in its active position.