Technical Advisory- Autopilot & Magnetometer Improvements
Two customers reported “small roll oscillations” or “loose autopilot performance” recently. An investigation revealed that changes to the AHRS calculations that affected yaw axis appear to be responsible. This may be more likely when certain (normal) magnetometer errors were present. The problem was eventually duplicated in the company test airplane (an RV-6A), which will be used to validate the fix.
A software fix is being pursued that will be made available by February 28, 2017. This fix will be identified on the website. Operation of the autopilot when exhibiting this roll oscillation is not dangerous, but could result in degraded ride quality.
Copied from GRT website, I'm unable to find the download for this improvement. Am I not looking in the right place or is this not available yet, if not when will it be?