The existence of a labor union does not make your point. You point to an industry group; I'm asking if there is a specific instance in the Boeing 737Max mishaps that is attributed to a union-member disregarding generally good safety practices by the very nature of being defended by the union. I'm not aware of one, but the opposite is true: white-collar decisions can be shown to be direct contributors to the problem(s), and I don't think they have anything to do with union membership.
E.g., Boeing did not 1) classify MCAS correctly in their hazard analysis, and 2) even with their mischaracterized risk in the HA, they did not follow their own procedures to have redundant sensor readings mandatory for the equipment as classified. Those are designer decisions, not some labor-union issue. To my knowledge, those held responsible were relatively high level engineers, implying they were not being protected by the union for their decisions.
E.g., Boeing did not 1) classify MCAS correctly in their hazard analysis, and 2) even with their mischaracterized risk in the HA, they did not follow their own procedures to have redundant sensor readings mandatory for the equipment as classified. Those are designer decisions, not some labor-union issue. To my knowledge, those held responsible were relatively high level engineers, implying they were not being protected by the union for their decisions.