I installed the G1000 w/AFCS into an Aero Commander 500 Shrike panel and all seemed to work OK until I tried to use the autopilot FLC mode. When I press the FLC button, I get the correct mode annunciation on the PFD and it immediately starts pitching in the direction of the new altitude target but then the VSI quickly drops back to near zero (<50 fpm) even as I adjust the throttle to climb or descend. The airspeed responds to the throttle changes, but the altitude does not.
All other autopilot modes work OK in the AC500S. Also, the FLC mode functions normally in the Mindstar C172SP and C182T w/ AFCS.
I don't have any other autopilot, airspeed indicator, or altimeter installed in the AC500S.
I compared the aircraft.cfg and panel.cfg files and didn't see any obvious clues. Likewise for the aircraft specific sections of the G1000.ini file.
Any suggestions?
Dave Steinmeyer
FSX-SE, Windows 10, no other add-ons