Not quite sure what you mean by the "Combat Arms AAC". The AAC is the AAC and that's it.
If you fail the Army Pilots Course as an AAC officer then you are out of a job. The AAC has no jobs for non aircrew officers. The only exceptions are those commissioned from the ranks of the groundcrew, towards the end of their 22yr service. They go on to become Quartermasters/MT Officers/Signals officers etc.
[This message has been edited by MightyGem (edited 20 August 2000).]