I'm close to first flight in my 10+ year ES project! I'm working my way through the G3X configuration and calibration procedures, and am stuck on the flaps, which seems to be a rather common issue. My setup includes two GDU 640's, GEA 24 and GAD 27, and a lot more. Flap position sensor is the RAC model, mounted behind the flap torque tube. I also have the CAXE solid state limit switches installed on the flap motor. (By the way, there is no flap motor coasting.) Flaps worked just fine from the panel flap switch, that is until now.
I went through the Garmin configuration process, setting the relative position stops, and this worked just fine, that is it worked just fine in the GDU 460 configuration mode. Then I saved my settings, and re-booted while still in configuration mode, per the on-screen instructions. Looking good so far. But upon returning to normal mode, flap indicator ribbon looked just fine, but the panel switch does not move the flaps at all, nothing, nada. I repeated the entire process, after clearing all settings, with the same result - no flap operation in normal mode. I have an inquiry into Garmin, but so far no response. They must be really busy.
Anyway, any advice would be much appreciated. This issue is the last issue on the airplane I have to resolve before first flight. Certainly there is a lot more to do relative to the avionics, but I've got radio working, engine information, vibration test, magnetic interference test and magnetometer calibration working just fine. Thanks Jim Anderson