Originally Posted by HarryMann
The Airbus was displaying some natural stability tendences maybe, whilst rocking in roll, it was from time to time, dipping its nose... nodding.
Sure, a brutal right bank increasing to 40° while full left stick was maintained continuously for 50 seconds, and a sharp pitch change of -28° nose down while full aft stick was maintained continuously for 40 seconds, is certainly related to aircraft stability when stalling with no speed worth to be mentioned.
But what changed the previous equilibrum (16° NU, TOGA, continuous oscillations in roll) seems to be the sharp reduction of thrust.
Originally Posted by HarryMann
Either that, or this coincided with PF releasing some of that NU, NU stick pressure. Commensurate, an increase in vertical speed would be expected.
No no. PF stick did not move from full left and full aft from ~0211:40 to 0212:15, while aircraft started to pitch down from 16° nose up after 0211:45 and reached 12° nose down in about 10 seconds (0211:55).
PF declared feeling a "very high speed" at 0212:02, and in fact, the aircraft accelerated by ~50 kt but from an airspeed close to zero.
It happened right after the captain came back on the FD. He should have been quite puzzled to see the horizon moving down and up again to zero, while V/S increased from 150%, with airspeeds/Stall Warnings disappearing (NCD) and reappearing (valid)...
TOGA put the aircraft back in stable attitude, close to zero pitch for a while and wings could be put barely level again.