Autopilot Pitch Problem

[djones]

I now have 13 hours on my Skyview system. The autopilot has been working great until Sunday. If when in level flight, I enter the altitude for the altitude I wish to fly (and currently am flying at) engage the autopilot and it commands a huge pitch up and heads for the stars. I actually think it would do a loop if I let it. No settings have been changed, has been working fine on 5.1, heading and track modes work fine. If I set an altitude currently lower than I am flying and engage the autopilot, it still commands a climb. All settings appear normal and the servo test works fine. Need some guidance here, where do I look.

 

[dynonsupport]

Have you checked if your shear screw maybe broke on your pitch servo?

The other possibility is that your AHRS G meter is now broken. Go into the PFD menu on the ground and press G METER. Does it read 1G or something else? The Autopilot always tries to not pull the wings off the plane, so if your G meter is always reading negative G's, it will try and pitch up to load up the plane.

 

[djones]

Have you checked if your shear screw maybe broke on your pitch servo?

The other possibility is that your AHRS G meter is now broken. Go into the PFD menu on the ground and press G METER. Does it read 1G or something else? The Autopilot always tries to not pull the wings off the plane, so if your G meter is always reading negative G's, it will try and pitch up to load up the plane.

Ahhhh, the g meter makes sense, definately NOT the shear screw.  The other day I turned the system on to find the g meter displayed when on the ground and it wouldn't go off until I reset the negative G pop up numbers to -.5.  Didn't pay any attention to what it was displaying, now I will have to look.  I assume that would mean the AHRS needs to go back to you if it's reading something less than 1G?

 

[dynonsupport]

Yeah, you will need to have us get that AHRS for repair if it isn't reading really close to 1G on the ground (it could be less if you are a taildragger, so check in a level attitude or in flight if needed)

 

[Dynon]

If the G-meter isn't reading 1g when in a level attitude (and the ADAHRS is aligned with that axis as it should be), then that most likely implies a problem with the ADAHRS, and we should possibly see it.

 

[djones]

So I am guessing this isn't a good sign.  :
Don't have enough altitude for 0G.