If you want rock solid proof that the company they are outsourcing to sucks and quality is going to drop, you aren't going to find it because that's the entire point of this move.

But ask yourself how many times quality has gone up after outsourcing critical operations to a group of shell companies based in a low regulation polity.

Also ask yourself why a safety and reputation critical company seems to have a corporate structure indistinguishable from one used to dodge legal liability in tax evasion cases.

How many leading aerospace companies do you think are based out of the Isle of Man? It does not even have a major airport.

As much as I hate to draw attention to the man's article because on the one hand I really do think as a commentary on what the real cause of the 737 MAX incident was I think it's totally off the mark; but the article does highlight some cultural problems that exist in other parts of the world that could lead a reasonable reader to the conclusion that outsourcing is fraught given there's a chance of propagating bad habits abroad.

https://www.nytimes.com/2019/09/18/magazine/boeing-737-max-c...

I emphasize I only offer it as a source of examples of bad airmanship recognized abroad. I still patently reject his conclusions of ultimate fault for the 737 MAX crashes.

Given the choice between having the internal Boeing trainers mentioned in the article, or potentially delegating it to a contracted pilot with said deficient airmanship, without the context I personally have into the industry from extensive hobbyist research, I couldn't fault someone for being wary. Especially given experiences with outsourcing in other verticals.

It's just not a move that makes sense in the current business world either unless I'm woefully out of date. Training pilots on proper aircraft operating technique should be part of Boeing's core competency. Since you really can't separate a highly technical product like an airliner from the dissemination of the skills and knowledge to use it.

To be frank I think Boeing management is trying to pilot the company into a smoking crater. If I had voting rights capable of moving anything, I'd be looking at votes of no confidence across the management echelon.