GPS Tracks off Center

[Flaps30 3]

I installed the Garmin 500 in the Pilatus PC-12 and it works fine, but it consistently tracks to the left of the magenta line, rather than right on. If I manually turn right on the course line, and then re-engage the GPS or localizer, it turns left to parallel the line, but not right on. Any way to fix?? Thanks. Tom

[Jim Robinson 122]

I've had that happen occasionally for some reason, but it's always been intermittent. It seems to happen on long multi stop flights where I "NAV" on the VORs for a while, then maybe the GPS for a while, maybe throw in an ILS or 2, and then for some strange reason GPS NAV will start tracking off to one side, sometimes by as much as a mile or two.Purely speculation, but I've noticed that AI aircraft tend to fly an offset course, I assume so they don't conflict with the user when flying direct between 2 airports. I wonder if the GPS/autopilot engine or whatever it is that magically keeps you on the pink line occasionally gets thrown for a loop and starts confusing you with an AI aircraft?Anyway, I've found that re-selecting the aircraft seems to clear it up, You might give that a try.Jim

[Flaps30 3]

Thanks Jim. Regards, Tom