United 232
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the hydraulic pump was selected non." This action did not restore hydraulic power. ยท At 1520, the flightcrew radioed the Minneapolis Air Route Traffic Control Center (ARTCC) and requested emergency assistance an.d vectors to the nearest airport. Initially, Des MoinesOpen official document at PDF page 7United Airlines Flight 232, McDonnell Douglas DC-10-10, Sioux Gateway Airport, Sioux City, Iowa, July 19, 1989