波音737NG飞机水平安定面疲劳裂纹处理方法分析

Method Analysis of Boeing 737NG Aircraft Horizontal Stabilizer Fatigue Crack Damage

根据波音737NG飞机的维护数据,该文分析波音737NG飞机水平安定面主要结构的受力特性;同时,定性分析了水平安定面肋下缘条及连接的蒙皮等部位的典型疲劳裂纹。分析波音公司针对该问题对现有机队的预防性改进措施,借鉴大修厂的实际维护经验以及一系列数据和现场照片,最终给出针对该疲劳裂纹的建议措施,以供民机设计制造单位及波音737NG营运人参考借鉴。

According to Boeing 737 NG maintenance data statistics,stress analysis of B737 NG horizontal stabilizer main structure was done. Underlying rib and adjacent skin were analyzed qualitatively,and the cause of fatigue crack was found out. Based on Boeing preventive solutions for existing fleet to deal with this damage,and the MRO( Maintenance,Repair & Operations) site maintenance experience with a series of practical data and actual photo,the fatigue crack measures were finally given for civil aircraft design. The results can provide some reference to manufacturing units and Boeing 737 NG operator.