Original Message

The Air Force once had an IST program for Army pilots.  In the 90's they would even take Warrant Officers and send them to Maxwell for OCS, then to a shortened fixed wing qualification course for former helicopter pilots.  They closed the program to Warrant Officer in the early 2000's, but still took commissioned guys for awhile.  The Guard/Reserve was always an easier route than active duty if you didn't mind the politics. 

I believe the Air Force IST program is currently suspended for all services.