China’s first home-grown narrowbody passenger jet has passed a battery of “deep level” safety tests as part of a step that is expected to help the C919 find overseas markets as its rival Boeing wrestles with a list of mechanical woes. China Eastern Airlines Technology, a subsidiary of the group that owns C919 operator China Eastern Airlines, concluded four days of “A-inspection” tests on Monday at a hangar in Shanghai, the Civil Aviation Administration said on Tuesday. The aircraft is required to undergo safety checks after either every four months, 700 flight hours or 500 flight cycles – meaning the...