The in game ATC does not use the “HEAVY” modifier during ATC communications when atc_heavy=1 is set in an aircraft’s aircraft.cfg file. My ingame ATC options are blanked out, which usually means it uses the aircraft.cfg’s configured options like AMERICAN 123 if the aircraft.cfg is configured with “atc_airline=AMERICAN” and “atc_flight_number=123” in the config file. I would expect it to say AMERICAN 123 HEAVY if all three options are configured.
Example aircraft.cfg:
atc_airline=AMERICAN
atc_flight_number=123
atc_heavy=1
Expected: “AMERICAN 123 HEAVY”
Actual: “AMERICAN 123”