United Airlines Flight 232 was a scheduled flight from Stapleton International Airport in Denver, Colorado, to O'Hare International Airport in Chicago. On July 19, 1989, the DC-10 (registered N1819U) operating the route crash-landed in Sioux City, Iowa, after suffering a big failure of its tail-mounted engine, leading to the loss of all flight controls. Of the 296 people on board, 111 died in the accident while 185 survived.