https://www.saleslink.aa.com/en-US/documents/Archives/AgencyRef/Schedule_Irregularity_(IROPS).pdf
The latest policy with effect from February 2019 is:
1. AA to/from non-OW on same or separate PNRs - no protection
2. AA to/from OW on same PNR - protection
It does not deal with:
3. AA to/from OW on separate PNRs - ???