All G1000 Series units with GDU software Version 2.02 through 7.01.
All GNS 400W and 500W Series units with Main Software Version 2.00.
DESCRIPTION OF ISSUE
Garmin has identified a condition whereby failing to remove an active arrival or departure prior to loading a new arrival or departure can cause erroneous course deviation indications and a loss of some navigation cues on the map display.
IMMEDIATE ACTION REQUIRED
Garmin has determined that in all cases when accepting a changed arrival or departure procedure from ATC, the flight crew must remove the active arrival or departure from the flight plan prior to loading the newly assigned arrival or departure procedure.
Future software versions will allow direct replacement of arrivals and departures without the need for first removing an active arrival or departure from the flight plan.