Eaton Aerospace referred all queries to Eaton Corp. A Japan Airlines Co (JAL) 787 suffered two fuel leaks in a matter of days in recent weeks - one at Boston's Logan airport in the United States, then a further spillage at Narita airport in Tokyo. Japan is the biggest market so far for the Dreamliner, with JAL and local rival All Nippon Airways Co flying 24 of the 50 Dreamliners delivered to date. A series of recent incidents - the fuel leaks, a battery fire, a wiring problem, a brake computer glitch and a cracked cockpit window - have focused intense scrutiny on the new plane. Boeing declined to comment on any investigations underway but confirmed Eaton Aerospace was a supplier to the 787 program. (Reporting by Rhys Jones; Editing by Mark Potter)