Hi,
Is it possible to load route-file on CDU ?
If yes, is it a PLN or a RTE file ?
In wich folder must it be put to be loaded ?
Thx 
It depends on your aircraft plugin, not handled by CDU hardware.
Thanks 
Found in folder : C:\Users\UserName\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalState\packages\pmdg-aircraft-738\work\Flightplans
Thx and sorry for the question.