It's weird because it's not code AUZ on FlightAware - it's ARR which is a muni airport west of Chicago (Aurora). Same airport, though, that has 3 different codes.
https://www.flightaware.com/live/flight/N536JA/history/20260324/0200Z/KARR/KTYQ
https://en.wikipedia.org/wiki/Aurora_Municipal_Airport