Details of answers to this question are addressed ad naseum in the AMEX thread on airline credits for certain AA expenses.
http://www.flyertalk.com/forum/ameri...s-aa-only.html
My specific answer is here:
http://www.flyertalk.com/forum/25385467-post412.html
I'd suggest reading the latest pages because at AMEX has slightly changed the reporting recently, although it has not affected reimbursement.