New install of dual skyview touch with AP panel and knob panel. Center stack is garmin gtr 200, GMA245 and, GNC355. AP panel is configured with auto trim for pitch only. When aircraft is straight and level autopilot is engaged roll hold and pitch hold. Within 10 to 20 seconds the pitch slip warning comes on the screen. Autopilot pitches nose down to about 400ft/min. A couple seconds later the same thing. Additional nose pitch down. Now vertical speed, shows about 800 ft/min down. This nose pitching down will continue without ever stopping. During this activity the skyview screen starts asking for trim nose down. Flight returns to normal after cancelling auto pilot.
confirmed wiring is correct on all connections. Three times. Returned pitch servo to Dynon for Inspection. No issues. Swapped out pitch and roll servos. Issue continues. Nose pitches down in simplified and expert modes. AP panel was swapped out with another AP panel from known aircraft in which it performed perfectly! Same issue. Roll servo hold course pretty well. I do geat a lot roll slip notices but. The aircraft stays perfect on roll course.
Dynon currently has flight data down load for review. I’m stumped ! Dynon’s help is good but scarce. Usually takes a couple days just to get a question asked. Any ideas would be greatly appreciated. Thanks in advance!
confirmed wiring is correct on all connections. Three times. Returned pitch servo to Dynon for Inspection. No issues. Swapped out pitch and roll servos. Issue continues. Nose pitches down in simplified and expert modes. AP panel was swapped out with another AP panel from known aircraft in which it performed perfectly! Same issue. Roll servo hold course pretty well. I do geat a lot roll slip notices but. The aircraft stays perfect on roll course.
Dynon currently has flight data down load for review. I’m stumped ! Dynon’s help is good but scarce. Usually takes a couple days just to get a question asked. Any ideas would be greatly appreciated. Thanks in advance!