Of course, if we now take it as a given that a mostly uncontrolled and rapid descent form FL350 to sea level occurred, there is almost certainly going to be one of the flight crew offering an expletive or two, indeed, '
I don't get it' (
none of this adds up) would be expected earlier rather than later.
Let us brace ourselves if much at all of the CVR is published... this is going to be heartbreaking of course
It is that subsequent (apparent) instability and lack of response, not the sudden pitch up itself, that is worrying me.
And let us remember that adjacent to highly unstable air masses, substantial increments of airspeed can be added or subtracted over very short timespans.