US-UNITED AIRLINES FLIGHT CRASH-RECORDER

Search crews investigate the wreckage of the United Airlines flight 232 20 July 1989 in Sioux City, after its crash at Sioux City Airport 19 July. United Airlines flight 232 was a scheduled flight operated by United Airlines between Denver and Philadelphia. On July 19, 1989, the Douglas DC-10 (Registration N1819U) operating this flight suffered an uncontained failure of its number 2 engine (mounted in the tail), which destroyed all three of the aircraft's hydraulic systems. With no controls working except the power levers for the two remaining engines, it broke up during an emergency landing on the runway at Sioux City, Iowa killing 111 of its 285 passengers and one of the 11 crew members. AFP PHOTO CHRIS WILKINS (Photo by CHRIS WILKINS / AFP) (Photo by CHRIS WILKINS/AFP via Getty Images)