it’s the second most expensive fare class under full J. In almost every market for international flights the AA fare hierarchy ia I, D, R, J. Most people only fly in I, for me our corporate rates give a healthy discount on R and J so i often fly those. Just do an EF search constrained to business class and AA and you see the hierarchy. Or if you dont have an eF subscription then search ITA with the restrictor F bc=r and you wil see them.