While descending from altitude, the EFIS stall warning went off, the airspeed showed 250kts and the wind speed showed 198kts while GPS ground speed and the analog ASI were normal (see pics). Glad I had the analog gauge and GPS to reassure me something terrible wasn't happening. Jonathon at AFS did a great job of analyzing the logs which clearly indicated a static system blockage in the tubing branch going out the wing to the AHARS. Water in that tube froze at altitude while the tubes going to the analog gauge were clear.
So my question is: what are some options on keeping the RV-14 static system clear of moisture? My old Cessna had a sump bottle near the static port but I'm not sure that would have helped in this case.
So my question is: what are some options on keeping the RV-14 static system clear of moisture? My old Cessna had a sump bottle near the static port but I'm not sure that would have helped in this case.