Recently there was a SVOTP (Special Voluntary Occupational Transfer Program) open to Infantrymen who were QL3 qualified. I believe files/applications for the SVOTP were due back in mid April timefame, however it might be worth a read, althought probably not applicable. Link below. Note, AC Op was not one of the Air Force trades listed in the SVOTP.
http://forums.army.ca/forums/threads/92450/post-915474.html#msg915474
However...
It is possible it *might* be easier to get a MOC Reassignment out of Infantry now as the trade *may* still be overstrength. Only a PSO or Recruiter would have accurate info on that.
If you aren't QL3 qualified yet, you may request a MOC Reassignment. You should try to get a copy of CFAO 11-12, which deals with MOC reassignments and OTs for Reg Force NCMs.
My advice is to talk to your Chain of Command about it. You'll need them involved anyways, as this would involve both your CoC and the PSO (Personnel Selection Officer) types.
As with any MOC, your CFAT scores would have to be reviewed to make sure you qualified for the AC Op trade. As well, AC Ops have to have an Air Factor of 4 I believe, which would likely involve a trip to see a MO for aircrew medical that AC Ops do. In short, you would need to meet any/all requirements for entry into the AC Op trade (stating the obvious to you probably).
Hope that helps some.
* CFAOs are not avail on the Internet at this time, and I don't believe it is posted here complete on the forum. Your immediate superiors should be able to get a copy of it printed for you.