correct as is Large effect of pitch trim changes in roll-only autopilot modes.

[Hippo]

Once again, apologies if this is not a bug.  Please move to appropriate forum if not.

In the attached track I am putting the a/c into the landing configuration.  If I engage the HDG A/P only, and use the trim (pitch) switch there are very large fluctuations in pitch of the fpm, which I don't see with the A/P turned off where I can use the hat repeatedly to very finely adjust AoA.  To my understanding we should not see an effect like this when using a roll-only A/P mode.

Relatedly, from my reading of the NATOPS, wrt ACLS it should be possible to engage ACL with CPL HDG on leaving the hold ("commencing") and keep it activated through the change into the landing configuration at around 10 DME.  I see the same effect in this case which can make trying to do this very, very difficult.

ap_hdg_trim_changes.trk

[BIGNEWY]

Hi 

based on the information we have it is correct as is. If you have public information showing otherwise please PM me 

thank you