maverick_fp00,
<Anybody know an average percentage rate of the guys from UPT that get selected to go fly a chopper?>
As far as I know, 0%. Maybe it is possible to get a helo out of UPT, but I have never heard of it - I can only speak for USAF.
<FAIP (I think First Assignment Instructor Pilot) but, what is it exactly?>
When you graduate from UPT, FAIPs (good guess on the name) go to PIT (pilot instructor training). It's a pretty intense course that makes you an instructor in a primary trainer (T-37, T-6, T-1, or T-38). Then you spend your first assignment teaching students how to fly (normally 3 years).
<Would you consider that good....>
For most guys - no. It really is a good job, but most guys want to go out and do something operational. Life as a UPT IP would likely be a lot more fun as a second assignment. I have some buds who loved it - good flying and most nights at home. A couple down sides: After your FAIP tour it is tough to land a great assignment (it can happen) - and- you will be a few years behind your peers in operational experience when you get to your first ops assignment. On the plus side, FAIPs usually turn out to be some of the better sticks and they rapidly upgrade to IP (I can only speak for the heavy world).
Purple