通过两起飞行不安全事件调查分析其机械故障致因的共同特点,指出针对老龄飞机重要系统、重要部位隐形故障安全隐患建立安全绩效监控指标的必要性。分析建立该类安全绩效指标的难点,提出通过维修工程可靠性评估可实现重要系统、重要部位维修可靠性指标筛查方法的有效落地。 Through the investigation of two common flight unsafe incidents, the common characteristics of the causes of mechanical failure are pointed out. The necessity of establishing the safety performance monitoring indicators for the hidden faults of important systems and important parts of aged aircraft is pointed out. Analyze the difficulty of establishing this type of safety performance index, and put forward that the reliability assessment of maintenance project can effectively achieve the landing of the important system and important parts maintenance reliability index screening method.