Asiana Air Flight 733 (OZ733, AAR733) was a domestic Asiana Airlines passenger flight between Seoul and Mokpo, South Korea, that crashed into Mt. Ungeo at 800 feet (240 m) on July 26, 1993. The aircraft, a Boeing 737-5L9 with registration number HL7229, failed to land twice in bad weather and crashed on the third attempt, causing the deaths of 66 passengers and 2 crew; there were 48 survivors.
Many of the passengers consisted of families with children who planned to vacation in southern Korea for the summer holiday. The pilot, Hwan In-ki, died in the crash. Chung Jong-hwan, the director general of the Ministry of Transportation, said that Hwan's actions caused the crash.
Flight 733 had the highest death toll of any aviation accident in South Korea at that time. It was surpassed by Air China Flight 129, which crashed on April 15, 2002 with 129 fatalities. It was also the highest death toll of any accident involving a Boeing 737-500 at that time. It was surpassed by Aeroflot Flight 821, which crashed on September 14, 2008 with 88 fatalities.