On March 3 , 1991 , United Airlines Flight 585 , a Boeing 737-200 , rolled to the right and went into a vertical dive while attempting to land in Colorado Springs , Colorado . The resulting crash killed all 25 people on board . The National Transportation Safety Board ( NTSB ) conducted a thorough investigation . Although a rudder problem was suspected , the aircraft 's rudder components could not be tested or fully evaluated because they were too badly damaged in the crash . As a result , the NTSB was unable to conclusively identify the cause of the crash
United Airlines Flight 585
United Airlines Flight 585
Eastwind Airlines Flight 517