Originally Posted by iff789
Originally Posted by
BOAC 
- do I take it that you are saying that the 2001 incident was caused by alpha reaching alpha-prot during an over-speed event, then?
I don't think anyone is suggesting that.
Transient overspeed in turbulence prompted the crew to close the throttles.
As speed reduced, turbulence then caused
transient increase of alpha to exceed alpha-prot (or the predicted trend to exceed it), this engaged the alpha flight mode such that the neutral sidestick would command alpha-prot (and fully back, alpha-max).
Ah well. You see what you see, I guess.
"If this is activated by a transient high alpha value, then when that transient effect goes away, you will get a climb. Alpha-floor then probably kicks in to increase the thrust after the pitch up." - That's really clever - when you inadvertently pitch too much, the system ensures you stay pitched too much. A climb no-one wants or needs - thanks AB!
God help us all.