根據這篇報導是降落太早了 還沒到跑道就著地了
同時也指出無死亡
http://live.foxnews.com/#/1155606219001
BREAKING: Asiana Airlines B777-200ER HL7742 (cn 29171/553) Jet Crash Lands at San Francisco International performing flight OZ-214 from Seoul (South Korea) to San Francisco,CA (USA) with 291 passengers and 12 crew, touched down short of runway 28L impacting the edge separating the runway from the San Francisco Bay while landing on San Francisco's runway 28L at 11:27L (18:27Z), the tail plane, gear and engines separated, the aircraft turned around by around 180 degrees and came to a rest left of the runway facing east. The aircraft burst into flames and burned out, all occupants were able to evacuate the aircraft in time and are alive. There are reports of a number of injuries, mainly burns, the majority of occupants escaped without injuries.
Emergency services reported all occupants have been accounted for and are alive.
ATC recordings show, the aircraft was on a normal approach and was cleared to land on runway 28L, no emergency services were lined up, all traffic was running normally. During a transmission of tower shouting in the back of the tower is heard, emergency services began to respond, all aircraft on approach were instructed to go around. The airport was closed. United flight 885, waiting for departure at the hold short line threshold 28L, reported people were walking around both runways, there were a number of people near the numbers of runway 28R, obviously survivors.