That might well be the case but neither of the tariffs desks (US and Dublin) I've dealt with would touch an agency booking with no AA overwater. You'd get a note back in your booking similar to the one BDA shorts got. Everyone's favourite aagent at the ATW desk told me that the only way to get such a booking rated was to book with them directly. Perhaps you got AA to take over your bookings prior to having them rated?

The one exception to this was a Europe Air Pass which naturally had no AA segments. But it got pass the US rates desk as my flights into and out of Europe (DONE4) were ticketed on AA and had a TATL segment on AA.