Incident
During the descent and approach to Jeju Airport, poor weather conditions prevailed as typhoon 'Doug' passed over, bringing turbulence and heavy rainfall. The aircraft was on final approach when the captain, suspecting windshear and microburst conditions, deployed flaps at 15° or 20°. The copilot twice informed the captain that the approach speed was 147 knots, which was acknowledged.
Sequence of Events
The captain continued the approach but remained too high on the glide path. Consequently, the aircraft touched down far along the runway, approximately 1,773 meters past the threshold. The runway surface was wet. With only 1,227 meters of runway remaining, the aircraft could not decelerate sufficiently. It overran the runway at a speed of 104 knots, colliding with a concrete wall and military barracks, and burst into flames. All 160 occupants were quickly evacuated, and seven sustained slight injuries.
Probable Cause
The official investigation determined the probable cause to be a wrong approach configuration by the crew, who conducted the approach at an excessive speed and too high on the glide. Investigations did not confirm any windshear or microburst conditions. Additionally, the crew failed to initiate a go-around procedure.