Sorry for the hard facts, but TUL, AFW and MCI mechanics are being paid at line mechanic wages while doing OH mechanic work. No other airline does that, then think about the overhead of those 3 base's. A lot of company's are farming out HR work, what makes you think AA won't farm out OH maint. AA has already taken steps to lesten the amount of FSC's AA has, not only by farming out their jobs at smaller airports, but by putting in automated parking system at the gate's of big airports.
Not even mentioning all the management at the OH base stations that are making a lot of money, but producing nothing, then there's the health care pension obligation's, all that kind of stuff. It seems like the logical choice to shrink AA, but not cut capacity. There will be a lot of layoff's and a lot of good mechs will leave AA. This will effect all the line stations because of the movement I'm sure. If they sell those base stations it will be horrible for those mechs that decide to uproot their families and move someplace more expensive then TUL.