The wreckage of the Asiana Boeing 777 on Monday was still lying on the runway where it came to rest at San Francisco airport.
Two teenage Chinese students were killed and more than 180 people have been injured.
U.S. investigators say initial findings suggest the plane was flying too slow as it came in to land.
(SOUNDBITE)(English) DEBORAH HERSMAN, CHAIR OF THE U.S. NATIONAL TRANSPORTATION SAFETY BOARD, SAYING:
"I will tell you that the speed was significantly below 137 knots and we're not talking about a few knots. We still have to corroborate some information. As I mentioned, this was a preliminary read of the flight data recorder and cockpit voice recorder."
National Transport Safety Board investigators say there were no signs of any problem until seconds before the crash.
The crew tried to increase power and abort the landing.
A second and half later it crashed into a sea wall.
Asiana has revealed the pilot landing the aircraft was in
