I've searched the forum but I can't find any sollution to this problem. The thing is that when I start my aircraft it's nice and quite, the STBY PWR switch is in ON position. If I flip it to OFF nothing special happens but when I flip back to ON again a terrible noice starts to play and nothing but turning STBY PWR back to OFF stops the sound, but in OFF position all the whole class cockpit goes dark.I've read that the sound is some kind of air conditioning sound, but I think it's way to loud, I won't even hear my engines spool up when that sound is on. The sound appears in 2d cockpit, spoy, VC and tower view. Not even pressing "Q" (no sound) gets that sound away. This has to be a bug, if not, could someboey please help me out?Thanks in advance!Oscar Pilgrim, SAS614

Oscar,This is not a bug. It's the backgound noises you will hear on an NG flight deck. It's A/C and misc. electric/electronical equipment. The engines are mounted on the wings outside the flight deck ;-) and are barely noticeable when running in idle. So this is correct. Though it can be experienced as loud by some.Don't know if you can turn the background sound down though... Maybe some more knowledgeable person can answer that! :-)Regards,

"I won't even hear my engines spool up when that sound is on."If you don't touch the switch, you don't get the noise, Oscar (but this may change in SU-2?).If it's too loud, I would turn down the sound levels of your speakers to prevent deafness (Cockpit noise sends real pilots deaf... this is why our pilots use noise-cancelling headsets these days ;-)).Your instruments should be your guide to what the engines and the rest of the airplane is doing. Pilots can no longer rely on flying solely by the "seat of their pants ;-)Cheers.Ian.