People work under an All Nippon Airways' (ANA) Boeing Co's 787 Dreamliner aircraft at ANA's maintenance center in Tokyo April 28, 2013. ANA, the Japanese launch customer for Boeing Co's 787, flew its first Dreamliner in more than three months on Sunday to test reinforced batteries installed by the U.S. aircraft maker.

The ANA flight was the second by an airline since aviation regulators on Friday gave permission for 787 operations to restart after batteries on two of them overheated in mid January. One was on an ANA plane in Japan and another on a Japan Airlines jet parked at Boston's Logan airport. Reuters/Yuya Shino