Originally Posted by BEA
The airplane’s pitch attitude increased progressively beyond 10 degrees and the plane started to climb.
Originally Posted by airtren
A factor of surprise for such a sudden response may have been the cause of the delay to the ND command, slowing the climbing vertical speed from 7000ft/min to 700ft/min.
More like, could a lack of response to an initial smaller NU response have led to continued NU application until the sudden response happened. They were in turblence, or chaotically moving air. Suppose that air movement was enough to momentarily negate the response of the aircraft to the pitch change. That might have altered the PF's response.
So he rather rapidly climbed and then reduced the climb rate. Pitots cleared. At least PNF got airspeed and both received a stall warning. And it all balled up at that moment with the PF response.
As an aside I'll be interested when the report comes out of PNF was kept abreast of what PF was doing as he did it, "I'm climbing for a little more altitude to (whatever)." If such statements as he was acting were not made that suggests to me a potential cultural problem for the team environment in the cockpit.