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Added June 19, 2007
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United Airlines Flight 585 was a scheduled domestic passenger airline flight from the now-decommissioned Stapleton International Airport in Denver to Colorado Springs Airport in Colorado Springs, Colorado.On March 3, 1991, the Boeing 737-200, registered N999UA, carrying 20 passengers and 5 crew under the command of Capt. Haro more
United Airlines Flight 585 was a scheduled domestic passenger airline flight from the now-decommissioned Stapleton International Airport in Denver to Colorado Springs Airport in Colorado Springs, Colorado.On March 3, 1991, the Boeing 737-200, registered N999UA, carrying 20 passengers and 5 crew under the command of Capt. Harold Green and First Officer Patricia Eidson, crashed as it was approaching the runway for landing, killing all 25 people on board.While on final approach to Runway 35 at the Colorado Springs Airport, Flight 585 suddenly rolled to the right and began to pitch downward, nose first. Attempts to initiate a go-around using a thrust increase and 15-degree flaps were unsuccessful. As the altitude decreased, acceleration increased to 4g. The 737 crashed into nearby Widefield Park, exploding on impact. Patricia Eidson was the second female pilot to die in an accident involving a United States commercial airliner. The subsequent investigation by the NTSB lasted one year and 9 months, but could not pinpoint the cause. However, after the crash of another B-737, USAir Flight 427, the investigation was re-opened in the UAL 585 case, and it was finally determined that both crashes were the result of a sudden malfunction of the rudder power control unit (PCU). The pilots lost control of the airplane because 'The rudder surface most likely deflected in a direction opposite to that commanded by the pilots as a result of a jam of the main rudder power control unit servo valve secondary slide to the servo valve housing offset from its neutral position and overtravel of the primary slide.' (NTSB revised report)
Tags Air, accident, flight, airlines, disaster, united, Colorado, 1991, boeing, denver, 737, 585
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