In 2014, Delta Air Lines announced their firm order to Airbus for 50 new widebody aircraft, including 25 A350-900. This model, bearing registration number N501DN and ship 3501, represents the first A350-900 aircraft scheduled to be delivered in the second quarter 2017. These A350-900, as well as the 25 A330-900neo that were also ordered, are part of Delta s strategy to update their fleet and replace older generation Boeing 747 and 767 aircraft beginning in 2017 and 2019. The long-range Airbus A350-900 will continue Delta s optimization of its Pacific network, operating primarily on long-range routes between the U.S. and Asia. The jets are expected to generate a 20 percent improvement in operating cost per seat compared to the Boeing 747-400 aircraft they will replace. The A350-900 will be powered by two fuel-efficient Rolls Royce Trent XWB engines. Inflight, passengers will experience 2Ku-band satellite Wi-Fi, wider panorama windows and more spacious overhead stowage bins.