The Pentagon believes it has identified the mechanical failure that led to a fatal crash of an Osprey aircraft in Japan and the grounding of the fleet for two months, a U.S. defense official told The Associated Press. The Pentagon’s Joint Safety Council is now working with the Air Force, Navy and Marine Corps on their plans to get Osprey crews ready to fly again, said Navy Rear Adm. Chris Engdahl, chairman of the council and commander of Naval Safety Command.