Airbus Group SA (AIR.PA) opened its first jetliner factory on U.S. soil on Monday and does not anticipate taking a hit to aircraft orders from the economic slowdown in China, Chief Executive Tom Enders said. The $600 million plant in Alabama will help Airbus meet plans to churn out 50 narrow body jets a month by 2017, up from 42 currently. Airbus is considering lifting that to 60 or more to meet a backlog of more than 5,400 planes.