mm43, nose never down notwithstanding the PF pushed the stick forward.
At 2 h 10 min 16, the PNF said "so, we’ve lost the speeds" then "alternate law […]".
The airplane’s pitch attitude increased progressively beyond 10 degrees and the plane started to climb. The PF made nose-down control inputs and alternately left and right roll inputs. The vertical speed, which had reached 7,000 ft/min, dropped to 700 ft/min and the roll varied between 12 degrees right and 10 degrees left. The speed displayed on the left side increased
sharply to 215 kt (Mach 0.68). The airplane was then at an altitude of about 37,500 ft and the recorded angle of attack was around 4 degrees.
The plane was stable for about 35 seconds before another stall warning, which may be appropriate given speed and altitude. What happened next seems to make no sense. I also wonder why PF did not push stick forward again to initiate a descent back to FL370, which would be safe and beneficial given the speed report that returned. Of course, he may not have trusted it.