Yes, the 727 reloading is one big thing on my list too. Couldn't cure it so far, all the tricks I've read about or tried myself didn't work.
She uses a sound gauge like the other planes too, reading the sound.ini, but I can only get her fully initialized when she gets reloaded, which messes up some of my ATC addons.

So I can only fly her with (my) ATC and without e. g. Switch sounds or with those sounds and without that ATC.
Maybe they fix her up to the state of the 707 which works just fine on the very first loading process.
I'm currently on a workaround for that ATC solution since I really like the plane.
[edit]Ok, I've found one (for the ATC, not the sound problem!), but this item could still be fixed in my eyes, no doubt.[/edit]