Don't try it with AA, at DFW they charged me $25 for 1 case being over 50 lb(63lb) on domestic first class tickets.What really p***** me off was the fact there were 3 of us with 2 cases between us the other one tipped the scales at 48lbs.Reading AA T&Cs we could have checked 2 bags each so 300lbs in total. This was the only time it was even mentioned on 4 flights over a 4 day period with the same luggage.