They have done the math.But someone somewhere has to know what it costs AA to overhaul a 777 and what an MRO will charge. Yes they have lower costs but after adding a profit margin to their lower costs I would think we would be close enough to offset the loss of quality, scheduling and future cost increases that outsourcing would bring.
Like a snake, they will shed now, getting rid of the dead skin, and grow new.
That is what Chapter 11 is all about.
Sad, but true.