Seadog: Certifiable - yes, seen by the JAA/FAA/CAA, but will the airlines want the person. It's very much up to who you are as a person, see that's why they have interviews and various tests before being taken on by an airline.
Some have it, and some others don't. They want to see how you react to stress, if you blaim bad test results on other factors than yourself, and if you cope well with working as a team.
But as long as you can see faults in your own actions, and you're able to perform tasks better by seeing what you've done wrong, you'll be attractive to the airlines!
Regards/lns