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In reply to the discussion: BREAKING: Boeing 777 crashes at San Francisco Airport. [View all]panzerfaust
(2,818 posts)Based on what I can find on the various news and av sites is that there was no mechanical, no evidence of power loss (as happened with the London crash - using different engines - due to ice crystals). The SFO 777 was completely visual as the glidescope transmitter was shut down on that runway. They simply screwed the pooch.
This could have been so terribly much worse.
Two of SFO runways remain closed this morning.
Guardian
http://www.guardian.co.uk/world/2013/jul/07/san-francisco-plane-crash-asiana-airlines
Here is a computer simulation video. The interview which follows the vid is not helpful ...
http://www.cnn.com/video/data/2.0/video/bestoftv/2013/07/07/nr-sfo-crash-animation.cnn.html
A still image, which seems to tell the tale:

Well, off to the airport