Knowledge of the aerodynamics of the stall on the A330…none at the time, and, even now, very cloudy (experts are now considering a pitch-up into the deep stall never encountered in flight testing).
Narval, I agree with all you are saying (except that they didn't have dual input indications), but transport aircraft are never exposed to any of these flying condition, certainly not deadly ones like deep stall and aerobatics. If the certification authority required this, they would also have to consider other highly unusual maneuvers, like rolls (yes, certain designer tested it out...), inverted flight, spirals aso. This is no aerobatics aeroplane or fighter, and it has a rather limited flight envelope.
If the next crash ends up in inverted flight, are we asking certification for this condition?
As you say, emphasize has to be put on training, that crews are never going close to these flight conditions. If they are, give them the tools to get out of it.
btw everyone who ever did basic aerobatic training knows the "let the stick in its position" procedure (which is only valid for stall and spins, not for all attitudes). Me thinks we should teach some cadets more aerobatics...
Dani