Fault diagnosis and life predication are key parts of civil aviation engine heath management system, and are the important means to achieve on-conditionmaintenance.
故障诊断和寿命预测是民航发动机健康管理的重要内容，是实现发动机视情维修的主要技术手段。
2
While accepting the mean TBO concept, on-conditionmaintenance and condition monitoring technology must be adopted in engine operation in order to obtain sufficient flight safety.
采用平均翻修寿命概念后必须采用视情维护和状态监控技术，以保证飞行的安全性。
3
This article briefly discusses the basic principle and method of machine condition monitoring, preventive maintenance and vibration diagnosis based on the vibration testing and analysis.