Originally Posted by DJ77
If this is correct, according to the BEA update on AF447, the FDs could have been available from 02:11:06 (when the IAS was restored on the ISIS) to a few seconds after 02:11:40 (when all speeds became invalid).
Maybe even before, when speed displayed on the left side increased sharply to 215kt. Airplane was at 37500ft with a recorded AoA around around 4 degrees.
What would have shown the FDs (or FPVs) at that time ?
Good catch
DJ77