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在对某型教练机的一架试验机飞行了几个架次后的例行检查中发现,活动舱盖透明件边缘上多处出现裂纹和腐蚀凹坑。通过对故障透明件形态的宏观观察,环境扫面电镜(ESEM)和断口金相观察、红外光谱试验等分析,以及对制造、试验过程的调查与分析,找出了故障源和产生故障的原因、并提出了改进措施。
After routine inspection of a test aircraft of a trainer aircraft for several flights, cracks and corrosion pits were found on the edges of the transparent cover of the movable hatch cover. Through the macroscopic observation of the morphology of faulty transparent parts, ESEM and fracture metallographic observation, infrared spectroscopy test and so on, as well as the investigation and analysis of the manufacturing and testing process, the source of the fault and the cause of the fault have been found out , And proposed improvement measures.