There was some discussion of this subject in Orlaam's topic on lateral tracking issues with the A2A S-TEC 30 autopilot, but as this is a separate issue I've started this thread to avoid confusion.
The problem I encountered was the A2A KAP 140 autopilot simulation failing to follow vertical guidance from the GNS 530 for approaches such as LPV and LNAV+V procedures. In response, Jean-Luc made the following comment here.
As suggested, I tried an approach with the "connect GPS to VOR indicator" option selected and the autopilot indeed intercepted the GPS glideslope. This would seem to be a good solution, except that it renders the NAV2 radio inoperable!
I did note the guidance on page 114 of the GNS 530 Pilot's Guide: "Enabling Autopilot Outputs for the King KAP140/KFC225." At first, I though this may be relevant to trying to troubleshoot the issue in question. However, presumably this procedure of manually enabling autopilot outputs during each relevant approach isn't included in the trainer because it's autopilot specific?
Anyway, still hoping a workable solution can be found as I'll be using the GNS more-or-less exclusive in A2A products.
Thanks,
Nick