Spirit AeroSystems reported first quarter financial results driven by positive operating performance of mature programs. Spirit’s first quarter 2015 revenues were US$1.7bn up 1% compared to the same period of 2014. Operating income was US$235m, up from US$194m for the same period in 2014. Net income for the quarter was US$182m, compared to net income of US$154m in the same period of 2014. Spirit’s backlog at the end of the first quarter was US$46bn driven by strong commercial aerospace demand.