Career ender? Reccomendation to DAPA and SARP?

My husband was returned from a deployment early officially for having being LLD and in need of further medical physical therapy. The unoffcial reason is that he was LLD because he got into a drunken fight with a roomate (also drunk) and was hurt. None of this was doented as his superiors were truly trying to help him out by not slapping him with an ARI and sending him to mast. He is truly a great guy that has been having some adjustment issues with some real jerks in his new command- combine his hard adjustment with alcohol and things got out of hand. Anyways, upon returning home and having the required medical evaluation the doctor thought it was fishy that he was sent home for such as small injury and DH, being an honest guy, told her the true reason. She reffered him for therapy to deal with the adjustment issues. Next the therapist finds out that alcohol was involved in the "unofficial" fight he had and is making him go to the DAPA for a refferal to the SARP program. With all that said in what cirstances would being reffered to SARP get someone discharged? He has 5.5 years in with good conduct and no previous incidents of any kind- he is also up for PTS this month and is facing HYT as an E-4 within the next 18 months. Will the issues with DAPA/SARP keep him from being accepted through PTS or hurt his already tight chances for re-enlistment? He is set for stay in rate or conversion if necessary to help his chances as well. Will it matter that honest to God the reason he was drinking was because of military related issues? I'm not making excuses for him, I'm just worried about him and want to be prepared to pick up his pieces if he needs me to. Thanks for any advice, I truly appreciate it.