At the top of the zoom climb with the airspeed dropping to below 60 kts the flight controls are literally useless. What the plane will do then is literally unknown. But this one did not respond to any inputs. It did not change until the end. Thus it was out of control at that point. Like many many other craft in the same situation.
And therefore in a "DEEP STALL"!
PS: I'm thoughtful.
I don't think "any inputs" is the correct statement? NU inputs
were almost continuously applied according to the BEA, once past the zoom climb? Were those correct? At 13 degrees NU the THS wasn't helping much now was it - how about ND for a sustained period, trim out the THS and see what happens? My interpretation of DEEP STALL is one that is nigh impossible to recover, maybe this was that, but NU doesn't seem the way out?
For now I'm gonna stick to conventional stall.