I was told by folks senior to me that this used to be a thing that could happen, until the SWO community got butthurt about it and made it go away. Given Pags's comment, I have no idea to what extent aviator SWO pins were a legit thing or a scam that met the intent of the rules without the spirit. I mean, it's not like folks were changing designators after, but the whole thing was before my time, and I was too junior to understand the nuances last time I heard of it.
I got my SWO pin on the TR in 1993. I had to meet the same requirements as the baby SWOs earning their pins and it was a massive amount of extra work and watch qualifications. While TR was in the yards, I went TAD to a Destroyer Squadron doing anti-drug ops in the Caribbean for many months so get some of the quals before I ran out of time in my tour (as TR wasn't at sea). In addition to the bridge stuff, I had to qualify at 4 or 5 different combat watch stations, a couple of engineering watch stations, small boat ops (launch, recovery, operating, etc.), UNREP to include the deck stations, damage control, all the major warfare area tactic, sea and anchor, admin stuff like 3M, and more that I've forgotten.
I could have done it all on TR but by the time I decided I wanted to do it, our yard schedule did not leave enough sea time so I went TAD. That was an eye opener.... Luckily I was a frocked LCDR and was basically assigned to the various ships' XOs for training with no other duties. I moved around between ships depending on what they were doing so I could hit all the wickets. It was a good deal in that respect because I spent all my time doing qualifications without any responsibility or other work.
It wasn't a scam or "SWO lite" for aviators. I was the first to do it on TR and I initially met a lot of resistance from the senior SWO (Reactor officer, post command surface nuke) but received a lot of support from the rest of the senior SWOs on board. The RO got relieved for cause and the new RO was very supportive. He was the one who arranged my TAD with his good friend the DESRON Commodore. I did my SWO board on TR (since TR CO was the one who had to approve my SWO pin) a couple of weeks prior to detaching for my next set of orders.