Originally Posted by
Clandestino
Hmmm.... inhibiting autotrim when stall warning is present, like it's inhibited in high speed protection? Interesting idea which might have some merit. While I currently can't think of any reason why it shouldn't be so, so far AF447 investigation has not uncovered a single reason why autotrim wouldn't work with pilots input. If pilots pushed forward, which is universally accepted as good idea when faced with upright stall, THS would follow.
This topic was already discussed
a few pages back. From the FCOM:
When angle of attack protection is active, THS is limited between setting at entry in protection and 2° nose down (i.e. further nose up trim cannot be applied). Basically, the idea was: why not do the same in Alt Law? (with the AoA protection remplaced by the Stall Warning, of course).