Hello RVers,
This is my first time on this forum. I built my standard build kit RV7A in 5 years. It has been flying since 2009 with over 480 hrs. O-360 Superior engine with fixed pitch Sensenich. The plane is fantastic. I just recently rebuilt the panel with G3X 10" & 7" screens, GTX45R, GTN650, etc. I have one issue that the Garmin X team cannot resolve. During my climb out I get a message that says magnetic compass anomaly and that I should check the installation. I installed the GMU22 using the Garmin mounting bracket on the aft deck per their instructions. I have calibrated the magnetometer 4 times now in three different compass rose locations. The interference test shows that the rudder movement is most likely the culprit. If I move the rudder left at a quick pace, the result is 92% of limit. If I move the rudder left at a slow pace, the result is 31% of limit. I thought of degaussing the rudder cables,eyelet, and etc. but I am not sure that is the problem since a compass needle really does not deflect much at all near them.
I read forums involving the RV10 from a few years ago but nothing about any problems with the GMU22 and the RV7A series.
Has anyone installed a GMU22 on the aft deck of a 7A and had either similar issues or non at all?
Thank you for reading. Safe & Happy flying!
Brad
This is my first time on this forum. I built my standard build kit RV7A in 5 years. It has been flying since 2009 with over 480 hrs. O-360 Superior engine with fixed pitch Sensenich. The plane is fantastic. I just recently rebuilt the panel with G3X 10" & 7" screens, GTX45R, GTN650, etc. I have one issue that the Garmin X team cannot resolve. During my climb out I get a message that says magnetic compass anomaly and that I should check the installation. I installed the GMU22 using the Garmin mounting bracket on the aft deck per their instructions. I have calibrated the magnetometer 4 times now in three different compass rose locations. The interference test shows that the rudder movement is most likely the culprit. If I move the rudder left at a quick pace, the result is 92% of limit. If I move the rudder left at a slow pace, the result is 31% of limit. I thought of degaussing the rudder cables,eyelet, and etc. but I am not sure that is the problem since a compass needle really does not deflect much at all near them.
I read forums involving the RV10 from a few years ago but nothing about any problems with the GMU22 and the RV7A series.
Has anyone installed a GMU22 on the aft deck of a 7A and had either similar issues or non at all?
Thank you for reading. Safe & Happy flying!
Brad