Linda. Thanks for that. Makes the results even more impressive then.
I understand the winglets benefit the 733s more than the 738s due to the latter's already larger wing. I am surprised they are still flying 738s without them though I would have thought they would be an easier mod than the 300s. Also the 757s have been in the fleet a while so unless they intend getting rid of the older birds I would have expected them to have been upgraded during maintenance by now. Anyone any insight on the plans?