※ 引述《[email protected] (天下"围攻"!!!)》之铭言： : 最近无意间在国外网站找到华航在1985年年初一起空中事故的报导: : 找了一下相关讯息, : 这起事故发生於1985年二月十九日, : 地点在美国加州外海41,000尺高空, : 疑似遇到乱流导致四号引擎失效, : 当机员试图重新启动四号引擎时, : 飞机在150秒内从41,000英尺急下降至9,500尺处, : 最後飞机於旧金山(该机原定往洛杉矶)迫降成功, : 两人重伤, : 飞机的水平尾翼也被发现有受损现象 : 想请问各位先进: : 这起事故的真正原因及其经过是什麽??? : 同时请问, : 这架747SP是不是於事故期间突破了音速??? : 谢谢! : 另外, : 这起事故已被拍摄成纪录片, : "空中浩劫"第四季的第七集, : 美加地区预定今年夏天播出, : 台湾地区播出时间未定 内湾是看不到推文的： 调查报告下载 http://www.airdisaster.com/reports/ntsb/AAR86-03.pdf 4314篇贴过调查报告的3.1 & 3.2，再贴一次 3.1 Finding 1. The flightcrew was properly certificated and qualified. 2. The Changing airspeeds encountered by Flight 006 and the resultant compensating throttle adjustments were caused by wind speed variations. 3. The No.4 engine did not flame out, but "hung" at about 1.0 EPR. 4. During his attempt to recover the No.4 engine, the flight engineer did not close the bleed air valve switch before advancing the No. 4 throttle. 5. The other three engines did not lose thrust nor did they flame out. 6. The captain did not disengage the autopilot in a timely manner after thrust was lost on the No.4 engine. The autopilot effectively masked the approaching onset of the loss of the airplane. 7. The captain was distracted from his flight monitoring duties by his participation with the flight engineer in the evaluation of the No.4 engine's malfunction. 8. With the exception of the loss of thrust on the No.4 engine, no other airplane malfunction affcted the performance of the airplane; the loss of thrust on the No.4 engine did not contribute to the accident. 9. The captain was also distracted by his attempts to arrest the airplane's decreasing airspeed, and this also contributed to his failure to detect the airplane's increasing bank angle. 10. The lateral control deflections required to maintain level flight under conditions of thrust asymmetry and decreasing airspeed exceeded the limits of the autopilot's lateral control authority, causing the airplane to roll and yaw to the right. The captain lost control of the airplane when, after disengaging the autopilot, he failed to make the proper flight control corrections to recover the airplane. 11. The damage to the airplane was a result of the acceleration forces and high airspeeds that occured during the upset and recovery maneuvers. p.34: 3.2 Probable Cause The National Transportation Safety Board determines that the probable cause of this accident was the captain's preoccupation with an inflight malfunction and his failure to monitor properly the airplane's flight instruments which resulted in his losing control of the airplane. Contributing to the accident was the captain's over-reliance on the autopilot after the loss of thrust on the No.4 engine. --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 71.237.67.217 ※ 编辑: kaichun1216 来自: 71.237.67.217 (04/25 23:45)