I don't think its OT, it was my first thought. UA would have had 20-22 MAX9s by this summer, and there are certain things it can do (e.g. fly to Hawaii) that UA will have trouble replicating w/o wide-body lift. I would think that they would not want to have any 763s nor 772s in conversion over the June-August period, or they are going to have to cancel flights or run a less reliable operation due to lack of spares.