Once you have your wings you can transfer to another service such as the Air Force (Guard/Reserve) and attend "Fixed Wing Qual" - no age limit for that course - only DOD issued wings required. I do believe you have to be <35 to receive your commission though. So if you have any desire to switch branches, go to Army flight school as an Lt. No plan to switch - stay WO!!! Coast guard also recruits Army helo guys for flying, but they want you to be less than 35 last I knew.