t A320, adding: ???It???s allowed us to close the transition between the [A320] and the [A320neo].???Airbus???s order data at the end of October officially listed 4,223 single-aisle aircraft in the backlog, including 1,771 current A320s.Analysis of a tentative Airbus schedule for the production transition, based on a full cutover to the A320neo by the beginning of 2018, suggests this backlog excee