Hey, last I checked a couple months back, the Navy was in such a hurt for pilots that they switched something like 50 FO candidates to NA candidates in A-Pool. Switching isn't unheard of. One of my good friends down here washed out in Primary at Corpus, and they let her come here. She's been kicking ass in VT-10. As for other examples of winged aviators switching to FO, our Academic Training Officer, who's a Marine major, did it. Some crazy story, but he winged as a pilot then got sent back to wing again as a FO. I've never heard of a winged pilot to navigator conversion in the Air Force, but the Navy and Marine Corps have definitely done it.