Abstract: A device for re-trimming a pilot control of an aircraft to keep a flight parameter at a reference value includes a first detection means for detecting the actual position of the pilot control, a calculation unit for determining the direction and magnitude of displacement of the control in order to re-trim the control based on the actual position and reference position, and a display structure for displaying to the pilot a characteristic sign indicating the direction and magnitude of the displacement needed to re-trim the control.

Abstract: A flight control device for an aircraft is provided with a control unit OP and a plurality of N instruction generating systems, each of which generates a first command instruction for the control unit OP and a least one of which performs autosurveillance and generates a corresponding surveillance signal. The flight control device is also provided with a plurality of P servocontrol systems, each of which is coupled to each of the instruction generating systems so that each of the servocontrol systems receives one of the first command instructions from each of the N instruction generating systems. Each of the servocontrol systems receives information identifying a particular position of a flight control unit, and each of the servocontrol systems communicates a second command instruction to the control unit OP based on the information.