Boeing's European rival, Airbus, will release its full year order and delivery tally on January 11. The Chicago-based company begins 2017 in an uncertain political landscape. President-elect Donald Trump has upended the certainty of Boeing's orders with its biggest single customer block, the airlines of China. And Republican majorities in the House and Senate have vowed to fight Boeing's 80 jet deal with Iran Air. Inside its factories, the aerospace giant begins a busy year. The company will begin introducing to airlines its updated 737 Max single aile jet, but will reduce output by 40% of its most profitable big airliner, the long-range 777. Boeing will also bring a new twin-aisle jet to its lineup this year, a 320-seat version of its 787 Dreamliner currently being assembled in South Carolina. It will also start early production of its new flagship 400-seat 777X airliner, which delivers in 2020.