Went over this in the main DSOTR thread. Coach got this case mixed up with a completely different case that he testified in (the Plane Ride from Hell suit was settled within a month of its filing for what should be obvious reasons), which is why he deleted that tweet. As for Vince, there are conflicting accounts regarding whether he was there or not. What we have of the lawsuit filing doesn't name him and Meltzer's reporting on the Plane Ride from Hell in 2002 says he wasn't there and he got conflicting accounts when he revisited it post episode (he found those saying he wasn't there more trustworthy, and said that there were other flights like this that Vince definitely was on during that period that people may be conflating this with). However, Chioda and JR put him there in the doc, and JR had also said Vince was on the plane in his second book. I don't think JR would lie about something like that, and DSOTR felt confident enough in the claim to put it in the doc.
I think JR would lie, a lot of people have said he's lied to them and he's done some shady stuff. His gimmick is a work, remember. It's not real. But more likely than that, I think JR would misremember.