Now that is good to know. I'm going to be pushing the six month limit for sure if I get the surgery.
It doesn't mean you're NOT getting attrited, either. Any "board," be it a TRB, Admin Board, FNAEB, etc. is part of processing you for attrition/separation/removal of flight status, and if the case is cut and dried, it's really a formality. However, if there are mitigating circumstances, by all means any of those boards should consider them. Generally, a "board" of any kind is tasked with gathering all relevant information and using it to make recommendations to some higher authority for a decision. The boss then reviews the proceedings and makes a decision. Admin board results go to BUPERS, FNAEB results to the big Air Boss, TRBs to the local Commodore, etc. Generally none of them are good places to be, but are also not rubber stamps.
I don't have personal experience with a med board (though I flirted with it being med down for a long time), but have been involved with some others in one way or another. CNATRA instructions should have a guide somewhere which details the process of a long-term med down situation. Find it, and be sure to distinguish any "shall" be attrited language from "should" language. I hope I'm not talking out my ass in my last two posts; maybe the six-month limit means you're screwed for all I know. But I piped up because I've noticed that sometimes students tend to view things like TRBs, HFBs, FNAEBs, and other "boards" as a rubber stamp on the road to getting canned, when they tend not to be that way in less cut-and-dried situations. Generally, good higher-ups will at least try to give you a fair shake. Granted, if you suck, that "fair shake" may involved a one-way ticket to COMCIVLANT, but still.