Originally Posted by
Euclideanplane
Exceeding stalling AoA is incompatible with the video which does show a nose dive and not a stall, is there agreement about that?
If there is physical damage to the aircraft in this scenario, would there be bits and pieces departing from it, and which ones?
What he is referring to is that -4g (besides very likely shedding the wings downward at -4g) would be prevented by a negative accelerated stall much below -4g at those speeds since the Cl max for an Airliner wing in negative direction will be much worse than in positive Cl. And at 230 kts even in positive direction max g (at Cl max) will be somewhere around 2,5. Above the AoA for that Cl max you will get an accelerated stall and no further increase in g load.
So we can pretty safely rule out -4g on aerodynamic/physics reasons alone.