Multiple fracture cases of fuel control pressure tubes from aircraft engines have been reported. The aim of the present study is to determine the cause of this tube fracture. The studied set was composed by the mentioned tube, a welded connecting pipe, where the fracture has been produced, and a union nut. The fracture has been produced in one most critical zones of the tube, in a region next to the supporting body of the union nut to the connector.

中文翻译：

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航空发动机燃油控制压力管失效分析

已有多起飞机发动机燃油控制压力管断裂的报道。本研究的目的是确定该管断裂的原因。所研究的装置由上述管、已产生断裂的焊接连接管和锁紧螺母组成。断裂发生在管子最关键的一个区域，即靠近连接器螺母支撑体的区域。