740 Knots after take off??? Did you know that in the real world, it's illegal to fly over 250 knots indicated below 10,000 feet (unless your aircraft is incapable of sustaining level flight below that speed)?
Anyway, you're panel config is probably trying to find the sound "sonic boom". You can go into the panel.cfg and use notepad to edit out that sound it's looking for. Before you do that, make a backup copy of it and save it as "panel.cfg_orig". Then you can rename the edited one "panel.cfg" - When and if you find the sonic boom sound , revert to the original panel config and see what happens.
It's quite possible that the sound "sonic boom" is really a GAUGE you can't see on the panel's bitmap. If that's the case, the procedure is the same except for the fact that the panel config will say "gaugeXX=sonic boom" (or something to that effect) if you can't find it being referred to as "sound=sonic boom". I had a similar problem in FS2002 with an F16. In FS2004, all gauges can be kept in the panel folder, which is brilliant if you ever want to delete a plane because you won't have to go hunting for the gauges that the panel requires in the "Gauges" folder. I now make a habit of putting all the panel's gauges into their panel folder - NOT in the gauges folder. This is one of the nicer things Microsoft did in FS2004.
Good luck and let us know if this rectifies the problem!
Cheers,
Bill
