Works like a dream and is exactly what I wanted to have :-) For now, I implemented it for the CRJ2 if AIRCRAFT_FILENAME == "CRJ200.acf" then dataref("door_open", "sim/cockpit/warnings/annunciators/cabin_door_open", "writable") dataref("eng_state", "sim/flightmodel/engine/ENGN_running", "readonly") function ambient_sound() if eng_state == 0 then door_open = 1 end end do_every_frame("ambient_sound()")endSo, many thanks for your help! Great support! Greetings, Sebastian