In order to solve the problem of reliability, safety and testability of aviation equipment, there are a lot of repetitive work in engineering application, such as repetitive FMEA. However, there are many management and technical problems in traditional FMEA, and the function and hardware FMEA method given in GJB / Z 1391-2006 also has some technical defects, which leads to poor application effect of FMEA, and even many real field faults can not be analyzed by traditional FMEA. This paper starts from the perspective of system engineering, fully combines with the product development process, Taking the product function as the input of the general quality characteristics, based on the function fault logic modeling analysis, and the case application of the flight control system can effectively avoid duplication of work and solve the "two skin" problem.