Interesting that no one has tried to look at it from the mechanic's point of view. Here's my take, for what it's worth. He was tired of the mulitple flagrant BS overlooks of critical safety related issues, including this one. We've all seen it once in a while, maybe more, if you've been in the flightdeck long enough and no matter what airline you're at, right? Funny that a nav light was out but they said the plane had been fixed of it's strike damage and was signed off, ready to go... I think this guy had it. Plain and simple. Calling the feds forever blacklists you among your peers. But throwing a chock into the engine it like saying, "I've had it! F@#K it! I'm done!" It's was easier, less painless and less of a hole to dig at the time then rating on his peers must have seemed to him.
I feel sorry for this guy. ...And I'm not flying Frontier again. Who ever thought Alaska had bad maintenance either until the already wornout jackscrew finally went. I wonder how those mechanics live with themselves. There's no excuse for this crap, but it goes on everywhere and here's a guy that finally snapped.