Abstract:

The requirements of Clause 683 in Federal Aviation Regulations Part 25 'Airworthiness Standards:Transport Category Airplanes'(FAR 25.683 for short)are analyzed. The compliance demonstration methods which combine analysis/calculation(MC2)and laboratory test(MC4)are used to verify that the civil aircraft with FBW flight control system is of compliance with FAR 25.683. The methods have already been applied to the airworthiness certification of an FBW flight control system of civil aircraft. Results show that the methods are appropriate and valid.

Key words: FBWflight control system, airworthiness requirements, compliance methods