I believe the "FDR case found, memory/storage missing" came at the 3 leaders brief, not from the BEA or prosecutor? I also saw somewhere reference to maybe this being the QAR?
If both the above have any truth, one can see the confusion?
Spec I have just read equates to 270K decelerating over 450cm. Given a 350K impact, I have no idea how much the tail would have slowed by the time the FDR area reached the surface?