The South Korean Boeing 777 that crashed at the San Francisco airport on Saturday most likely wasn't descending too steeply, and had two working engines at the time of impact, according to the latest round of incremental updates on the investigation into what went wrong. On Monday, the National Transportation Safety Board held another press conference shortly after Asiana Airlines revealed that the pilot landing the doomed plane was a novice at the Boeing 777, having logged just 43 hours flying it.
On Sunday, the NTSB outlined an initial timeline of events leading to the crash. And while it looks like none of the basics have changed, the agency has added to the story. So here's what's new:
—There's no evidence suggesting an abnormally steep descent. There was an early rumor that the plane was in a steep descent just before impact, dropping 4,000 feet per minute. The radar data analyzed by the NTSB, however, doesn't support that rumor. From what the agency has released so far, it looks like the concern here isn't the steepness of the descent, but rather its speed.
—At impact, the 777 was 31 knots below target air speed. The NTSB has already explained that the plane came into San Francisco at a speed "significantly" off target, but now they've outlined just how off they were. And the slow speed wasn't due to engine problems: "The engines indicate that both engines were producing power," NTSB Chairman Deborah A.P. Hersman said on Monday.