Only west planes go to El Salvador, and US maintains the the 737s, 757s, A320 family in-house and the west planes will cease going to El Salvador soon. And it took an abrogation in bankruptcy court to allow outsourcing on the East, only thing outsourced is 767 and A330 on the east.
Dont let the facts get in your way.
And come January, the M&R will be going into section 6 negotiations for the SECOND post merger contract, getting more improvements, something you dont know anything about, now do you?