Yes, my mistake, sorry.
The engine was originally picked up from DFW, because that is where it was situated. It is being returned to AFW which is where one of AA's main maintenance bases are for the B767-B777, but mainly because TAESL (Texas Aero Engine Services Limited - a joint venture between AA and Rolls Royce) is also situated there and that is where it is being repaired under warranty, being paid for by RR.
If anyone is interested, the cost of the charter alone was $500,000.
I do have some pics of the inside of the very A/C that I will try and post over the next few days.