Originally Posted by
Blumie
JumboD's two posts suggest a significant risk that the OP will end up on a 763 on the BOS-LHR portion, whereas I consider the risk to be exceedingly low (and, in any event, in the unlikely case that AA does sub in a 763, they almost certainly would be willing to reroute him via LAX, ORD, JFK, DFW or MIA to preserve the F seats that he reserved).
really, i can push AA to make sure I have F seats since the award ticket is for F roundtrip in the event that they do switch my reservation from a 777 (as it is currently booked) to a 763?