Note that not all AA flights are covered by the BA/AA/AY/IB transatlantic Joint Business Venture. All AA-operated (including subsidiary) flights should definitely be available, I think all AA-coded flights should be available. Fairly obviously flights by AA from the USA mainland to such places as Hawaii, Hong Kong or Sydney are not in the JBV.

You will also need a published fare, or allowable combination of fares, that covers the journey you want. It's not possible to advise in much more detail without knowing the actual itinerary and preferably dates that you want to travel on.