There were 2 other serious POI not in the AA fleet, the reports of which were NOT circulated to other operators, and for that Airbus is being faulted.
Airbus is going along with the recomendations btw....
Also AA fleet of 35 was by far the largest body of flying time on the aircraft so the law of averages was bound to catch up with them eventually....
Big fleet of jets doing very high time and cycles.... There is not much virgin terrirtory left there...
(yes I know UPS later orderd 60 but they are much newer at a lower utilization.)
Cheers
Wino