Unless I'm reading this incorrectly, I think I would be protected:
Separate Tickets
oneworld Re-accommodation
When customers are holding separate ticket(s) on AA to/from a oneworld carrier in the same PNR, they should be treated as through ticketed customers.
In the event of a disruption on the originating ticket, the carrier responsible for the disruption is required to reroute the customer to their final destination.
(
https://saleslink.aa.com/en-US/resou...ons-irops.html)