Lee Park wrote on Aug 24^th, 2012 at 8:36am:

I've another question that comes to mind after flying the 737 and the 707. They both have awesome engine sounds. The 727 lacks. you don't get that same sound as with the 737. Has anyone updated sounds or is there an addon package obtainable somewhere? It would just add to making the experience even greater.

the 737 has TSS sound set i have the TSS set for the 707, they have a 727 set but its for FS9 and i dont know if it would be compatible or easy to convert.