Originally Posted by dvs7310

I've seen reports of both, some people said they only got cost based credit and LPs from AA and I suspect that's going to be true if AA ticketed. Also of note, AA won't use partner codes on AA metal flights. My RTW last year had 2 fairly substantial AA segments on it (DFW-GRU-JFK) and fortunately they credited by miles flown as special fares (so base + cabin bonus + elite bonus). Mine was a QF issued ticket and suspect that does matter. I had one other AA domestic segment but managed to get it ticketed on the QR code.

When crediting to AA, basically for max mileage / LPs, the pecking order is
1) QR, BA, IB, AY codes
2) AA codes only if Special Fare
3) QF codes on flights to / from North America
4) Pretty much everything else since I think all other OW carriers credit D at 125% (+status bonus) to AA
5) AA codes if cost base