A backup actuation control unit for controlling an actuator dedicated to a given surface, the backup actuation control unit comprising: a processing unit operatively connected to one of a flight control computer and a backup flight control computer, to an actuator used for actuating a given surface and to at least one primary actuation control unit (40, 42), each of the at least one primary actuation control unit for controlling a corresponding actuator used for actuating the given surface; wherein the processing unit is configured to receive a surface position command signal from one of the flight control computer and the backup flight control computer and an actuator position signal received from the actuator, and the processing unit is configured to provide a corresponding command signal to the actuator in response to receiving an engagement signal from (i) the flight control computer or the backup flight control computer and (ii) from the at least one primary actuation control unit (40, 42), the processing unit is configured to further provide a reporting signal to the at least one primary actuation control unit, and the processing unit comprises a servo command and engagement logic unit, an analog acquisition module, a current driver and more than one switching unit (70, 72, 74), each of the more than one switching unit (70, 72, 74) being actuated by a corresponding engagement signal received from each of the flight control computer or the backup flight control computer and from the at least one primary actuation control unit (40, 42); further wherein each of the more than one switching unit (70, 72, 74) is serially connected to an output of the current driver, the output of the current driver is configured to provide the corresponding command signal to the actuator; wherein the analog acquisition module is configured to receive the actuator position signal from the actuator and to provide a digitized signal indicative of the actuator position signal; further wherein the analog acquisition module is configured to receive the corresponding command signal provided to the actuator and to provide a digitized signal indicative of the corresponding command signal; and further wherein the servo command and engagement logic unit is configured to receive the surface position command signal from one of the flight control computer and the backup flight control computer, the digitized signal indicative of the actuator position signal and the digitized signal indicative of the corresponding command signal. a processing unit operatively connected to one of a flight control computer and a backup flight control computer, to an actuator used for actuating a given surface and to at least one primary actuation control unit (40, 42), each of the at least one primary actuation control unit for controlling a corresponding actuator used for actuating the given surface; to one of a flight control computer and a backup flight control computer, to an actuator used for actuating a given surface and to at least one primary actuation control unit (40, 42), each of the at least one primary actuation control unit for controlling a corresponding actuator used for actuating the given surface; wherein the processing unit is configured to receive a surface position command signal from one of the flight control computer and the backup flight control computer and an actuator position signal received from the actuator, and a surface position command signal from one of the flight control computer and the backup flight control computer and an actuator position signal received from the actuator, and the processing unit is configured to provide a corresponding command signal to the actuator in response to receiving an engagement signal from (i) the flight control computer or the backup flight control computer and (ii) from the at least one primary actuation control unit (40, 42), the processing unit is configured to further provide a reporting signal to the at least one primary actuation control unit, and the processing unit comprises a servo command and engagement logic unit, an analog acquisition module, a current driver and more than one switching unit (70, 72, 74), each of the more than one switching unit (70, 72, 74) being actuated by a corresponding engagement signal received from each of the flight control computer or the backup flight control computer and from the at least one primary actuation control unit (40, 42); further wherein each of the more than one switching unit (70, 72, 74) is serially connected to an output of the current driver, the output of the current driver is configured to provide the corresponding command signal to the actuator; wherein the analog acquisition module is configured to receive the actuator position signal from the actuator and to provide a digitized signal indicative of the actuator position signal; further wherein the analog acquisition module is configured to receive the corresponding command signal provided to the actuator and to provide a digitized signal indicative of the corresponding command signal; and further wherein the servo command and engagement logic unit is configured to receive the surface position command signal from one of the flight control computer and the backup flight control computer, the digitized signal indicative of the actuator position signal and the digitized signal indicative of the corresponding command signal.