Date: March 03, 1991
Time: 0944
Location: Near Colorado Springs, Colorado
Operator: United Air Lines
Flight #: 585
Route: Denver - Colorado Springs
AC Type: Boeing B-737-291
Registration: N999UA
cn / ln: 22742/875
Aboard: 25   (passengers:20  crew:5)
Fatalities: 25   (passengers:20  crew:5)
Ground: 0
Summary: While on final approach to Colorado Springs, the aircraft suddenly rolled to the right and pitched nose down until it reached an almost vertical attitude before hitting the ground. Uncommanded deflection of the rudder caused by the jamming of the main rudder PUC servo valve. The rudder malfunction forced the rudder to go in the opposite direction the pilots commanded it to go. First female pilot to die on the flight deck of a major U.S. airline.

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