[spokeshave]

I recall seeing a diagram of the flight profile after the accident....

it shows that thee is only something like a 50mph area of stability at 35,000 ft...and the aircraft went up to 38,000 ft....so its into unstable flight conditions where there isn't enough air density to sustain correct lift.

[raygun]

Yeah, that must be it given the AB330’s 41700’ service cieling.