A320 lateral deviation on ND on final approach
Flown a few approaches recently on old A320s, (very old editions with the original FMGC). These are non-GPS aircraft.
Flying an ILS, passing the FAF, noticed that the ND shows a course deviation of 99.9L.
Anyone have any ideas on what is happening here? Or how to troubleshoot this? We have managed to get a few photos of this but at this point of the approach, its not the place for trouble shooting.
No other ECAM or MCDU scratch pad messages when this occurs.
Thanks for any suggestions.