I know I may get a flaming for this - but by way of an excuse, my point is a general one and not specifically related to this accident...
We have heard from various sources that the S76C++ autopilot will not pull the lever up so as to exceed an engine limit. Therefore my question is, if ALT is coupled on the collective and there is a double engine flameout, how would the AFCS handle it?
Software can be pretty dumb and perhaps it would see the aircraft descending, see that torque and N1 were pretty low, and raise the collective?
To be fair, even if it did this it would not be an airworthiness issue because with or without the AFCS trying to raise the collective, unless the pilot lowers it very quickly, rrpm will get too low to recover.
HC