Originally Posted by Flyyak
Need help with dual G3X 370/375 and garmin 430W with 305 autopilot installation of TO/GA button. I have a GSU73 with the ability to use Discrete 1,2,3,or 4. What type switch or button is used and will the 430W couple to fly the missed approach? Thanks in advance
Page 28-4 of the Rev. AG G3X installation manual
shows how to wire a TO/GA button to a GSU 73 and GTN.
Note that the GNS 4XXW/5XXW units don't support an external Go Around button like the GTN 6XX/7XX, but you can still wire the TO/GA button into the GSU 73 to trigger TO and GA modes on the G3X.
You will have to manually activate the missed approach on your GNS 430W just like you do now since it doesn't support the remote button. The 430W will still provide guidance and let you couple to the missed approach just like a GTN after you activate the missed approach on the 430W.
Let us know if you have additional questions. We are always available to help via email or phone as shown below.