For NG you would need to talk to the Aviation Brigade and see if they are accepting applications for LT Aviation officers, if they are then you will apply, take the SIFT, pass the flight physical, and sit for a review board. Talk to others that have applied to the same NG unit about what type of LOR's would be best.
Those that apply for WOFT (Warrant Officer Flight Training) are required to have LOR's, most will visit an Aviation unit and talk to some of the pilots to get their LOR's, most do not really know these pilots but they will ask you a lot of questions and then write their LOR. The best thing to do if you are looking at NG Aviation is to get at least two LOR's from current pilots, try and get them from those that have been in for a while.
Don't think that because your GPA is at 3.1 that you don't have a shot at AD Aviation. Branching is set up so that only 55% of those selected are from the upper OML and ADSO's, the rest come from the Branching Model which take people from all over the OML. The best thing you can do is to pass the SIFT with a 50 or higher so you can get your flight physical at Advanced Camp, pass your physical, and ADSO for Aviation. Make sure you put AV as your #1 choice.
Thanks very much for your response. Especially the part covering the OML system. That's very encouraging as I had no clue it was set up like that. I will definitely be ADSOing Aviation #1 and then MS #2 with intentions of dropping a 67J packet. I've purchased a SIFT study guide book in addition to the FAA handbook and will be setting up a time for my flight physical hopefully before camp this summer. I appreciate all the info.
Jcleppe is spot on.
Study hard for the SIFT. It is in your best interest to get a flight physical at advanced camp, so scoring 50 or higher is key.
Getting a flight physical elsewhere is VERY difficult to arrange especially if you don't know anyone. It's best to be done during advanced camp.
If you live near an Army base, then it's possible. I wouldn't count on it though.
The other way to do it is if you're lucky enough to get a CTLT slot with an aviation unit. Aviation guys take care of their own so they can probably set you up with a flight physical with their flight surgeon. Don't count on that either.
Get the SIFT score required to get it done at camp.