I have recently upgraded my RV7 from a GNS 430W to a GTN 650xi. I have spoken to several of the guys in the Garmin experimental area (Ken, Caleb and Mike) and one member of the Garmin pilot support side over the last week to resolve several issues, mainly configuration issues. I have a G3X system (370 and 375) with a GSU73, GSU25, GMU44, GTX23ES, roll and pitch GSA28, GMC305 and a GMA240. With the great help from these guys, I have all the wiring and configuration bugs resolved with the exception of one issue. My G3X configuration shows all green with all connections and interfaces and I do not have any errors displayed on the GTN650xi. The issue that remains is - the G3X will not capture the Glide Path on an approach and will not provide vertical guidance to the autopilot. With the help of your team, we have verified the configuration and interface between the G3X and the GTN on a couple of occasions but still no luck.
First let me verify that before I removed the 430W, I flew several approaches and the G3X, GNS and autopilot worked flawlessly. Here is what happens now with the GTN - I have test flown the RV using the autopilot for gps navigation with a flight plan and it captures and flies the plan (lateral navigation) without any issues. I have flown a flight plan from KEKY to OKW with the RNAV rwy 5 LPV approach and all is well with lateral navigation but the G3X will show GP in white when on the final approach course but it will not capture the GP for vertical navigation. I have tried this approach loading the approach and activating the approach when reaching OKW and the autopilot will fly the approach from OKW to KHANN to MEATA to WONOR to Rwy 5 but it will not provide or capture vertical navigation and the plane will be at 2400 or 2500 at the end of the rwy. I have tried the approach by activating the leg OKW to KHANN , then when established on the leg, activating the approach and it captures lateral navigation but same result with vertical navigation. I have flown the approach by using vectors to final to KHANN , activating the approach and again it will fly lateral navigation but will not capture vertical navigation. On each flight the G3X (PFD) will annunciate GP in white but it will never show vertical bars or will cature (turn green). On each of the flights the GTN will switch (annuciate at the bottom) from gps (magenta) to LPV (green) as it should on the final approach course. The screen will display a visual approach icon. On each flight, I have activated the approach on the GTN and I have activated the approach on the GMC305. The 305 will couple for lateral navigation but will not capture the GP. Each time the GP is white on the PFD on the G3X but it never captures for vertical guidance and turns green. I do not get an error message on the GTN or G3X. I have photos of the G3X and the GTN configuration pages if needed.
Has anyone who has completed this upgrade had this issue and been able to resolve it. I am told that it is not a wiring issue and it appears not to be a configuration issue between the G3X and GTN since no error messages. Obviously the unit is receiving a valid gps signal and I understand that the lateral and vertical navigation is split internally in the unit. Any help will be appreciated.
First let me verify that before I removed the 430W, I flew several approaches and the G3X, GNS and autopilot worked flawlessly. Here is what happens now with the GTN - I have test flown the RV using the autopilot for gps navigation with a flight plan and it captures and flies the plan (lateral navigation) without any issues. I have flown a flight plan from KEKY to OKW with the RNAV rwy 5 LPV approach and all is well with lateral navigation but the G3X will show GP in white when on the final approach course but it will not capture the GP for vertical navigation. I have tried this approach loading the approach and activating the approach when reaching OKW and the autopilot will fly the approach from OKW to KHANN to MEATA to WONOR to Rwy 5 but it will not provide or capture vertical navigation and the plane will be at 2400 or 2500 at the end of the rwy. I have tried the approach by activating the leg OKW to KHANN , then when established on the leg, activating the approach and it captures lateral navigation but same result with vertical navigation. I have flown the approach by using vectors to final to KHANN , activating the approach and again it will fly lateral navigation but will not capture vertical navigation. On each flight the G3X (PFD) will annunciate GP in white but it will never show vertical bars or will cature (turn green). On each of the flights the GTN will switch (annuciate at the bottom) from gps (magenta) to LPV (green) as it should on the final approach course. The screen will display a visual approach icon. On each flight, I have activated the approach on the GTN and I have activated the approach on the GMC305. The 305 will couple for lateral navigation but will not capture the GP. Each time the GP is white on the PFD on the G3X but it never captures for vertical guidance and turns green. I do not get an error message on the GTN or G3X. I have photos of the G3X and the GTN configuration pages if needed.
Has anyone who has completed this upgrade had this issue and been able to resolve it. I am told that it is not a wiring issue and it appears not to be a configuration issue between the G3X and GTN since no error messages. Obviously the unit is receiving a valid gps signal and I understand that the lateral and vertical navigation is split internally in the unit. Any help will be appreciated.