Originally Posted by
H Peacock
Now some AFCSs in ALT will try to climb or descend the ac if the sub-scale is changed (certainly some Bombardier ac will), while others remain level regardless. That all said, the sub-scale would normally only be changed when descending or climbing to a new Alt, Ht or FL, ie not when intending to remain level.
Sounds like the S-92. Pumas and 175 don’t do it.