okent Posted July 1, 2019 Report Share Posted July 1, 2019 Went on a cross country over the weekend and plane was fine. had to park for a bit to let a storm blow through and when I took off after there was a very light sprinkle. On takeoff at about 400ft AGL the AOA went to red and stall warning went off. Pushed the stick forward to level off and checked speed on D100 and GPS and all good. Airspeed remained alive and matched GPS. Turned out of pattern and headed home and stall warning stayed on. It was just me so I switched off the intercom and could still use radio so I didn't have to listen to the stall warning. Landed uneventfully and at the hangar the pitot looked normal, no but in the hole I could see. Anything obvious I'm missing? I had read where rain can block the pitot but I figure that would have killed my airspeed indication. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted July 2, 2019 Report Share Posted July 2, 2019 The AoA gets its pressure from the hole on the sloped portion of the pitot tube. Must have gotten some water or a bug in it. The line needs to be disconnected from the back of the Dynon, and blown out. Never blow into the instruments. Quote Link to comment Share on other sites More sharing options...
okent Posted July 2, 2019 Author Report Share Posted July 2, 2019 Thanks Tom! That was my guess since it was lightly sprinkling. I'd think there would be a drain hole for that system unless the plane should only be flown in dry conditions. Quote Link to comment Share on other sites More sharing options...
okent Posted July 3, 2019 Author Report Share Posted July 3, 2019 Update, line was removed and blown out. On takeoff run the stall warning came back on and aborted. Plane will be getting a checkout next week. Quote Link to comment Share on other sites More sharing options...
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