What would be the effect on a modern airliner such as the A330 if it experienced a high speed stall at high altitude? I seem to recall a 737-800 coming close to experiencing such an event which required flying at slightly reduced altitudes by the airline for a period afterwards whilst it was investigated. Unfounded speculation of course but if the A330 was operating at 41,000 ft with significant load and optimum cruising speed and then encountered unexpected severe turbulence could this cause such a stall and could the damage to the aeroplane be severe enough to cause a break up?