grizz;
That's why it's called a PFM box... you never know for sure.
gums;
Looks to me that the stuff we see from the "maintenance" recorders and transmissions from the AF jet was only "blips" of all the data that still resides in the flight data recorders.
The mistake some made in the early discussion was treating the 24 ACARS messages as the same kind of information as flight data recorder information - most on the thread now know that inferences from the messages is a mug's game.
There are data recording solutions which come close to resolving the timing issues, but "granularity" becomes an issue if important parameters, (especially in older equipment) are not recorded at sufficient rates-per-second, (and can't be precisely coordinated with others which aren't recorded at the same rate. If the sidestick is recorded at 16x/sec and the elevator rate, for example, is recorded at 4x/sec, how does one match each side-stick data point with the 4 existing elevator points? And this is quite different than the problem of "filtering", which the FAA has addressed, (and towards which I do not wish to divert the thread).
Not sure what you mean by "sampling at 100hz" or how such a parallel system would work, but there is a lot of variations on a theme.