This is a fictional livery American Airlines for the
Cessna C208B Grand Caravan.
The registration numbers are part of the livery and can’t change in the
ATC options of the simulator.
Usage:
This livery can be used for the Asobo C208 Grand Caravan Ex (G1000).
The Black Square Analog Caravan version can be found here:
https://flightsim.to/file/39044/black-square-c208-american-airlines-fictional
Installation:
Unzip the archive and copy the containing folder in your MSFS
community folder.