No, you got that backwards. In 2008, AA ordered 42 787-9s. As part of the bankruptcy restructuring of that agreement, AA and Boeing agreed that AA could substitute up to 20 787-8s instead of the 787-9s originally ordered. That conversion was so that AA could begin flying 787s earlier than if it waited for the 787-9s.WorldTraveler said:AA did convert some of their 787 orders to 787-9. Boeing's site says AA has 12 787-8s on order which is a small subfleet compared to their 767s if AA does intend to take 787-8s.
Two 787-8s are scheduled for delivery to AA in late 2014.
I agree that the 787-8, being a shrink, isn't the optimal aircraft, and that the 787-9s make more sense. Especially given the industry-wide standard now of lie-flat J seats, which take up a lot of real estate. It's not all about the total number of Y seats you can cram in, it's also about how many lightweight square feet you can fly so that everyone in Biz can enjoy direct aisle access.