针对外场某型涡轴发动机首次装直升机起动冷运转过程中,发动机有异常响声的故障现象,对发动机进行了分解检查、质量复查、原因分析和机理分析等工作,找准了故障原因,制定了预防措施,完善规范了发动机装配工艺规程,有利于预防同类故障的再发生,提高了该型航空发动机的安全性和可靠性。 In view of the phenomenon that the engine has an abnormal noise during the first cold-starting operation of a turbofan engine installed in the outfield, the engine was decomposed and checked, the quality was reviewed, the cause analysis and the mechanism analysis were carried out to identify the cause of the malfunction and formulate Preventive measures, improve the norms of engine assembly process rules, help prevent the recurrence of similar failures and improve the safety and reliability of the aircraft engine.