Hi Aj, Sometimes X-Plane 10 and some addon aircraft can get a bit confused if you don't go Aircraft, Open Aircraft (the default where X-Plane "spawns" the aircraft at the current airport on the "default start location"). Or if you then try and reposition the aircraft to say gate 12, or cargo ramp or Rwy 27 etc. or use any other method to "load an aircraft". The initial setting of the aircraft/X-Plane may be different (hense you may see lights flash or hear "warning dings" etc. The same sort of "mixed up settings" occours when you try selecting "Replay mode" on some addons. So try loading X-Plane 10, go Aircaft, Open Aircraft and see if you get your "The ding sound drives me nuts...". If it's not that causing your problem, try: 1. As a quick and dirty work-around, you could just back up the "ding" sould file, edit it to reduce it's volume by say 80% so it dosn't anoy so much. or.... 2. Backup and then reset your X-Plane preferences, in case something in the settings have become corrupted (as per Kris Pryo's great post's above). cessna729.