2025年11月的UPS MD-11坠毁事件与已知的发动机机身缺陷有关,尽管事先警告和检查,但五架飞机(包括坠毁的飞机)仍失灵。 A UPS MD-11 crash in Nov. 2025 was linked to a known engine mount flaw that failed on five planes, including the crashed one, despite prior warnings and inspections.

据NTSB称,2025年11月在肯塔基州路易斯维尔附近坠毁的一架UPS MD-11型货机上,一个关键的发动机机载组件,先前在另外四架飞机上失灵。 According to the NTSB, a crucial engine mount component on a UPS MD-11 cargo plane that crashed in November 2025 close to Louisville, Kentucky, had previously failed on four other aircraft. 在2011年的一份服务信函中,波音警告说,球盘轴承赛中疲劳症是发动机与机翼连接的一个部分,但并不认为这个问题是一个飞行安全问题。 In a 2011 service letter, Boeing warned of fatigue cracks in the spherical bearing race—a component that connects the engine to the wing—but did not consider the problem to be a safety-of-flight concern. 坠毁的飞机于2021年经过目视检查,没有安排对数千次额外飞行进行彻底检查,该部分在同一地点失败。 On the crashed aircraft, which had passed a visual inspection in 2021 and wasn't scheduled for a thorough inspection for thousands of additional flights, the part failed in the same spot. NTSB正在调查波音的维修规程和指导是否充分;预计18至24个月将提出最后报告。 The NTSB is looking into whether Boeing's maintenance protocols and guidance were adequate; a final report is anticipated in 18 to 24 months.