Weird.

For example, the 747-400 didn't have the extreme "reliability" problem in ORD until after the new post-merger management team found an ingenious way to save $$$ by not duplicating the stocked spare parts in ORD with the ones in SFO.

Just imagine the savings!

(The problem was any pre-depatrure MX delay in ORD could cause the FAs to go illegal without sufficient international FA RSVs to cover an entire crew---which is itself yet another example of the imaginary savings providing by tight staffing.)