As I did not find any request of some sounds here in the forum I would like to post some that are missing or some that can be replaced. Maybe the team is aware of and that would be solved with SP1, just in case.
Brake Fan - Sound exists in ASC folder but no sound is played in sim.
Avionics On - Sound exists in ASC folder but that sound is not played in sim. Instead, when Ext. Power is connected the sound played is a similar one used for throttle detents plus the avionics cooling