02-27-2026, 02:04 AM
(This post was last modified: 02-27-2026, 02:07 AM by Joaquin24.
Edit Reason: Added information about autopilot
)
I’ve been using the GTN650Xi for a few months now, and about a month in I noticed that the glide path stopped showing up entirely for LPV, LNAV/VNAV, or even the advisory vertical guidance you’d expect on LNAV+V. I’ve tried multiple approaches at different airports, always flying the full procedure from the IAF to the FAF, and the GP never appears at all.
The odd part is that the glideslope for ILS works perfectly, so I can fly ILS approaches with no issue. Everything is fully updated (XP12, the Cherokee 140, and the 650Xi). Just trying to figure out if this is a known issue or if I’m missing something obvious
I have also tried to look up some fixes including: Uninstalling the TDSSIM gps and reinstalling from scratch, checking for errors like 'NO GP' (none at all, approach mode is always shown as active), making sure the proper nav source was correctly selected, making sure the SBAS reciever was on and powered. However, none of these fixed it.
I am using the VflyteAir Cherokee 140 with the aspen E5 PFD for context. At this point I’m just trying to get RNAV vertical guidance/glide path working again so I can actually use LPV and VNAV approaches the way they’re supposed to work. Any help would be appreciated.
I have also found a weird workaround; sometimes, if I enable approach mode on the autopilot, it will show up. However, it won't come down normally to intercept at the FAF. I have to move the plane backwards manually (using Xpad) and start the approach again, then it will sometimes work.
The odd part is that the glideslope for ILS works perfectly, so I can fly ILS approaches with no issue. Everything is fully updated (XP12, the Cherokee 140, and the 650Xi). Just trying to figure out if this is a known issue or if I’m missing something obvious
I have also tried to look up some fixes including: Uninstalling the TDSSIM gps and reinstalling from scratch, checking for errors like 'NO GP' (none at all, approach mode is always shown as active), making sure the proper nav source was correctly selected, making sure the SBAS reciever was on and powered. However, none of these fixed it.
I am using the VflyteAir Cherokee 140 with the aspen E5 PFD for context. At this point I’m just trying to get RNAV vertical guidance/glide path working again so I can actually use LPV and VNAV approaches the way they’re supposed to work. Any help would be appreciated.
I have also found a weird workaround; sometimes, if I enable approach mode on the autopilot, it will show up. However, it won't come down normally to intercept at the FAF. I have to move the plane backwards manually (using Xpad) and start the approach again, then it will sometimes work.