TOKYO (TIP): US safety officials and Boeing inspectors joined a Japanese investigation on Friday into the 787 jet at the center of a worldwide grounding of the technologically advanced aircraft. Japanese TV footage showed the American investigators — one each from the Federal Aviation Administration and the National Transportation Safety Board and two from Boeing Co — inspecting the All Nippon Airways jet on the tarmac at Takamatsu airport in western Japan.

The investigation is being led by the Japan Transport Safety Board The pilot of the ANA plane made an emergency landing Wednesday morning after he smelled something burning and received a cockpit warning of battery problems. All passengers evacuated the plane on emergency slides.