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Northwest Airlines Flight 85 was a flight from Detroit Metropolitan Wayne County Airport to Narita International Airport that experienced a rudder hardover event on October 9, 2002 when the flight was in proximity to Anchorage, Alaska. The flight diverted to Ted Stevens Anchorage International Airport. No passengers or crew were injured, but the incident resulted in an airworthiness directive to prevent the possibility of a future accident.〔"(ANC03IA001 )." ((Archive )) National Transportation Safety Board. Retrieved on December 23, 2012. "the captain said the airplane was at a cruise altitude of 35,000 feet with the autopilot engaged, when it abruptly rolled into a 30 to 40 degree left bank."〕 The aircraft involved was the first production Boeing 747-400 (Boeing 747-451, c/n 23719, reg N661US) built by Boeing and was delivered to Northwest Airlines as the launch customer of this type on December 8, 1989. ==Incident flight== The flight departed Detroit Metropolitan Wayne County Airport at 2:30 PM Eastern Daylight Time. The incident occurred at 5:40 PM Alaska Daylight Time.〔Wallace, James. "(Aerospace Notebook: Boeing, NTSB investigating 747 rudder incident )." ''Seattle Post-Intelligencer''. Tuesday November 5, 2002. Retrieved on December 25, 2012.〕 At the time of the incident, Captain Frank Geib and First Officer Mike Fagan had just taken control of the aircraft, allowing Senior Captain John Hanson and First Officer David Smith to rest.〔Steenblik, Jan W. "(ALPA's Annual Air Safety Awards )." ((Archive )) ''Air Line Pilot''. Air Line Pilots Association. January 2004, p.19. Retrieved on December 25, 2012.〕 Flight 85's captain said that the event occurred at FL350 (35,000 feet).〔 The aircraft abruptly went into a 30 through 40 degree left bank.〔 Geib initially believed that an engine failure had occurred. Hanson re-entered the cockpit, and he and Fagan hand-flew the aircraft. Geib declared an emergency and began a diversion to Anchorage.〔 While trying to declare the emergency, the plane was in a communications dead zone between North America and Asia. Even with a weak signal, they contacted another Northwest Airlines flight, Flight 19, who helped Flight 85 declare the emergency since they were closer to Alaska. Flight 85's captain reported that none of the emergency procedures available could correct the problem.〔 The pilots established a conference call with Northwest Airlines at the Minneapolis-St. Paul area, and the Northwest employees there were unable to find a solution to the sudden bank.〔 The flight crew took back control of the aircraft and landed at Ted Stevens Anchorage International Airport. In order to steer the aircraft they had to use asymmetric engine thrust, or varying input into the engines; they were unable to use the ailerons at the time.〔 Hanson said that crew resource management (CRM) contributed to the flight's safe landing at Anchorage; he said "This was a classic application of CRM. We were blessed and lucky that we had full flight crew augmentation. We had four pilots to work together in the cockpit. We had an excellent group of flight attendants on board; that became important later because we briefed this as a ‘red’ emergency, which means there’s at least a solid chance you’re going to have to evacuate. We weren’t sure we were going to be able to keep the airplane on the runway."〔 The incident did not initially receive media attention.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Northwest Airlines Flight 85」の詳細全文を読む スポンサード リンク
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