Re: [新聞] 韓航738於2010/09因發動機單發失效轉降-調查報告出爐

看板Aviation (航空板)作者crazybb時間14年前 (2011/12/28 18:00)推噓5(5推 0噓 11→)

留言16則, 9人參與討論串2/2 (看更多)

※ 引述《nyrnu (~新年快樂,萬事如意~)》之銘言： : 韓航738於2010/09因發動機單發失效轉降北京事件--最終調查報告出爐 : 原路線: Irkutsk (Russia) to Seoul (South Korea) : 事件: A Korean Airlines Boeing 737-800, registration HL7786 performing flight : KE-2984 from Irkutsk (Russia) to Seoul (South Korea) with 36 passengers and 8 : crew, was enroute at FL330 about 320nm northwest of Beijing (China) when the : #1 engine (CFM56) shut down automatically. The crew diverted to Beijing for a : safe landing. : 調查報告: 這太難翻譯了, 只能請版上熱心專業人士解讀 : http://avherald.com/h?article=44849c09 An axial overload, which was applied to accurately engage a tool into the drive shaft square for the Borescope Inspection (BSI) without knowing that the metallic foreign material was in the drive shaft square, 在插入BSI (內視鏡檢查)所使用的工具前，未能發現有不該存在的金屬碎屑在drive shaft square裡，而導致轉軸超過負荷而受損. 解釋: 內視鏡檢查是會利用一根四方型延長桿插入到特定插槽，藉以旋轉N2段來檢查內部然而那個插槽裡面有不該存在的碎片在裡面，工具又硬塞進來，造成額外的壓力導致軸承受力損壞 (翻譯米糕: 老爺不要硬來，會壞掉) resulted bearing damage in the AGB line 4, such bearing damaging caused a misalignment problem related to the gear shaft offset, 軸承受損導致齒輪軸心的偏移 the high-pressure compressor rotation RPM (N2 RPM) fluctuated due to gear shaft misalignment resulting from ball bearing damaging, 進而導致N2段因為齒輪軸心偏移而產生晃動 (或是振動，忽上忽下，總之就是會抖) and eventually the Electronic Engine Control (EEC) sensed it and made the engine shut down. EEC (發動機的控制電腦) 感應到不正常震動而將發動機關閉然後下面的條文列了事情的發展總歸就是不該有的東西導致有零件受損那不該有的東西不知道是從哪來的飛機出廠前有做過一次BSI 2010 4/11由韓航做過一次BSI 兩次在執行工作時都沒有發現那插槽有外物而那碎屑被認定為在交機前就存在然後在做檢查，安裝工具時因為那額外的碎屑而擠壓到軸承導致受損之後就巴拉巴拉........ 底下有人留了一句話: very profitable flight -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.224.216.72