I may be wrong, but I doubt the NTSB did much investigation. They determine probable causes of plane crashes, which in this case wasn't really in doubt. And now that the evidence is gone, they couldn't do much except work their magic with the flight recorders. My Dad works there in a capacity that would make him aware of their involvement. I'll ask him about it tonight.
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Cogito ergo spud -- I think, therefore I yam
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