The National Transportation Safety Board in the US has published a series of pictures of the aftermath of the crash, including the external wreckage and an interior shot showing oxygen masks hanging from the ceiling of the cabin and seats bent.
The NTSB plans to interview all four pilots aboard the aircraft, the two at the controls and two relief pilots for the long flight. Deborah Hersman, chairwoman of the NTSB, told the global press on Monday that investigators will closely examine the crew's coordination in the cockpit. They have recovered both "black box" in-flight recorders from the 777, which should reveal exactly why the aircraft came down.
Deborah Hersman, head of the National Transportation Safety Board, said the plane was travelling well below its target speed of 157mph.
"We're looking at what they were doing and why they were doing it," Hersman said. "We want to know what they understood."
She said the NTSB wants to get the facts straight about who was the "flying pilot" in this leg of the flight and "who was the pilot in command in the cockpit."
Although the captain, Lee Gang-guk, had spent nearly 10,000 hours at the controls of other planes, he had never landed at San Francisco before.
He was sitting alongside another pilot who had flown 3,200 hours in 777s and around 12,000 hours in total.
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