Key word here is "wash out". Despite what many believe, I know pleanty of guys with a 121 failure that went on to other 121 gigs without a problem. I could be wrong, but im pretty sure it just takes time. If you bust something in training or recurrent, come back and pass, and then go years at said airline without an issue, im sure a future employer would see that and assume you just had a bad time. If you cant overcome it and get fired....that's a different story. Again, just my opinion.