Originally Posted by
HazelNuts39
Without autotrim, the PF would have pulled more to follow the FD, or to maintain 15°, or 12.5° pitch, or to arrest the V/S.
Not to mention that the autotrim does not and did not move of its own volition, but moved in response to the consistent and excessive (for the conditions) backpressure on the stick from the PF.
The fact that the A320 seems to have a hard limit on autotrim in Alternate whereas the A330 does not is an interesting line of discussion, but it's not really a subject within the scope of the report.