Rate of descent: greater than cruise descent, but less than emergency descent (loss of pressure)
Speeds (really only ground speeds for now), are in the normal range (not too fast, not too slow).
Someone shoots pilots and crashes plane into mountain is ONE scenario.
COCKPIT Fire , loss of consciousness OR PARTIAL loss by crew after they started a descent.
everything else doesn't make sense.
A reminder, that SULLY was talking up a storm while he landed in the hudson and had less than 2 minutes in the air after engines out.
These guys had 8 minutes to do something, UNLESS they were incapacitated or PARTIALLY incapacitated either by nefarious or accidental reasons.