A quality risk identification and assessment method for aircraft manufacturing and maintenance

Aircraft manufacturers have been striving to reduce quality and safety incidents during aircraft manufacturing，operating，maintenance phases. If only using the Process Failure Mode Effects Analysis（PFMEA）method for quality risk identification and assessment，there are problems such as the analysis does not include the aircraft use and maintenance process，the failure mode recognition rate and accuracy are not high，and the recommended measures are imperfect. The quality risk identification and evaluation method proposed in this paper expands the PFMEA method to analyze the quality risks during the use and maintenance of aircraft，maps the Design Failure Mode Effects Analysis（DFMEA）results to the PFMEA analysis through a set of rules to improve the recognition rate and accuracy of failure modes，and integrates and optimizes risk control measures using the tree analysis diagram method. Using the method proposed in this paper to analyze a hydraulic pump circulating heat dissipation pipe in a hydraulic system，the results show that the method proposed in this paper can more comprehensively and accurately analyze the quality risks during aircraft manufacturing，operating，and maintenance，and obtain a more optimized set of quality risk control measures.