Originally Posted by
JJeffrey
IME the boarding pass fare code isn't the final indicator during rebooking.
Several times when I've been rebooked my new boarding pass will show J or Y, however I still only earn based on the original fare class. But other times I've also earned as if it were a full Y or J fare. All depends on how the AAgent actually processes it, it can go both ways, YMMV.
but in this case the ticket was sent over from UA to AA so not sure how AA would know what the original UA fare class is much less map it to the appropriate AA one