Abstract: With the massive application of composite parts and components in the batch production and service phase of civil aircraft, the problem of composite damage failure has gradually emerged. In order to standardize the work of failure analysis of composite component damage, based on the experience of carrying out failure analysis of composite component damage, the process and method of failure analysis of composite component damage in civil aircraft have been established. Combined with the case of damage failure of the outer hatch of the landing gear of the flight line, the reverse inversion of the hatch damage failure process is carried out to find out the cause of the damage failure, and to provide a solution to the problem or optimization for the design, manufacture, and maintenance of the composite parts and components, which provides an analytical procedure and a methodology that is easy to be guided and implemented.

Key words: composites, routes, damage failure, processes and methods