Originally Posted by
indigopete 
A stick pusher is an emergency recovery system that basically assumes the pilot is effectively "dead" (or at least their brain is). Not dissimilar to a dead man's handle on a train in some limited respects. It's on all/most airliners regardless of their design and is independent of the manoeuvring characteristics of the particular type.
Well not quite.
It's on around two thirds of all airliners. The rest are A318s, 319s, 320s, 321s, 330s, 340s, 350s and 380s