Be careful though, my father in law has told stories about people who made themselves irreplaceable by being the only person who can fix a machine because they allegedly fixed it in a way that breaks often enough that they can be the hero. A stain like that on your resume means your burned trust for potentially short term gains and may find trust is not given as easily as a result.
Actually doesn't matter if you do or if you don't, since it can't be proven. What matters is whether or not somebody accuses you of "fixing it in a way that it breaks".
In this case it was apparently proven enough that the place wanted to fire the person, the union said "you can't fire him but you can escort him out and tell him never to come back" so being accused is just the tripwire that brings the rocks down. Don't pile rocks up there in the first place and there aren't rocks to fall!
