Word I got from a pilot pal of mine is that AA is really struggling with aircrew staffing. It really shows towards the end of the month when crews begin to run up against their max allowable hours, and they have to cancel flights or delay flights until they can find crew that work the flight. A crew that would typically work a 3 or 4 leg flight day often has to bail after a flight or two, leaving that plane stuck where they left it waiting for crew. Planes out of position and crews out of position, etc.