Conspiracy theorists and armchair pilots: There is an evolving theory the right engine was functioning (there was no credible data verifying failure like the left one) and a functioning engine was shut down and unable to be restarted in time. The statistical probability of a dual engine failure due to ingestion is unbelievably small. NWA (now Delta) loses three to four engines a year due to ingestion, considering the number of flights the frequency is extremely small given the total number of flights and none on the same plane.
That is just what I have heard on the street relayed second hand. It will be interesting to see what the engine data shows.
Michael Smith