Hi HN39,
"On page 17 under "The CVR timing" Airbus writes:
CVR time 12H 44'31'' equated to DFDR time TGEN 266"
Thanks for drawing that CVR timing reference to my attention, which I had not noticed in the 1991 Airbus document. It certainly confirms your interpretation of the co-ordination between the GMT references and the "TGEN" time frames which you had used in your
graph, and contradicts (by one second) my own as used in my
post #122 of Dec 18, which I also used in #130 and #133.
So the BEA definition of t=0 at 1245:39 clearly occurs at DFDR time-frame 334.0 secs. IIRC, that is the last time frame in which none of the (sequentially recorded?) data was corrupted.
And the GMT minute is not updated until the time frame (TGEN) 1 second after the beginning of the minute, i.e., the first 1245 GMT (at TGEN 296.0) represents 1245:01, and the last 1244 GMT (at TGEN 295.0) represents 1244:60, which would be 1245:00.