Originally Posted by
eponymous_coward
Not so much on the *A side since AA bought US and took it out of *A (and partnership with UA) to OW. But yes, there are planes that have a pmUS config as opposed to pmAA, there aren't completely unified employee contracts yet (so crew out of pmUS bases can't bid for pmAA routes), and so on. You'd only see it if you flew AA.
(sorry, but if I don't say it, someone will). US bought AA, not the other way around. Or I guess technically they agreed to merge, though AA's hand was forced in bankruptcy by (US and the bankruptcy stakeholders) and the resultant leadership was US leadership. They kept the AA brand however.