Originally Posted by gonebutnotforgotten
It can't be the errant overspeed protection that caused the Turkish A340 skywards leap in 2000
According to the AAIB report there was indeed a short overspeed condition but overspeed protection was never active. The zoom climb was due to the AoA exceeding alpha-prot due to turbulence, and the Nz law then changed to an AoA law, which maintains alpha-prot until the sidestick is moved forward.