Hi,filling a squawkbox-flightplan with the necessary data i'm not sure, what to enter at 'Aircraft Capabilities'.A screenshot of the flightplan-form: hereThanks for help.

I always file /FKyle

The aircraft is /G by FAA standards. The GNS-XLS has GNSS. Also, remember, that most JS41s are used outside North America, and would usually file using ICAO equipment codes, which are much more specific than the FAA suffixes.