NAS has plenty of experience in milking Boeing for money... when the B788s were out of service in 2013 they wetleased a ton of aircraft on Boeings account. The current engine checks are on happening the same way. I'm pretty certain the max fiasco is not hurting Norwegian. While the Wow BK has provided relief, the legacy carriers are desparate to fill the newly purchase longhaul widebodies and have introduced basic fares to match DY & co. That will hurt in S19. Also inside Europe the legacies are fighting FR and DY tooth and nail, so that still provides for cash flow but doesn't earn much. That said I doubt they are selling below cost.