Thank you! I actually hid the post after I made it at first because I realized it was hard to read. But I saw it had gotten an upvote in the few seconds it was up so I restored it.
The twitter user is an actual commercial pilot, and ACARS messages do look like that. Not sure what's up with SKW2438/SKY2438 but otherwise it seems legit. I think faking it would be harder than actually doing this.
Edit: Here's a picture of a much longer message in a more professional, non furry rp context:
Considering pilots shitpost on guard to the extent that actual emergencies threatening lives are literally not able to be heard… I don’t doubt this lol
Except that that might explain the slightly different alias on that line. Maybe it's a message just like the rest, sent for the sake of the meme, and the alias just happened to get typed incorrectly...