I had a mate, cpl techie, who applied for pilot and was accepted. He was commissioned as a pilot officer but got the chop on his flying course. As I remember it he had to leave the Service because he was not offered an alternative as an officer and he couldn't revert back to the ranks. He was rather peeved because he was now out of a job.
In todays RAF if someone takes the airman to officer aircrew route and fails the flying course, will he have lost the chance of a career in the RAF as a Techie?