Doubt cast on testing of Dreamliner battery

Posted: May 26, 2014 at 3:14 a.m.

FILE - In this Jan. 24, 2014 photo, National Transportation Safety Board's Joseph Kolly, holds a fire-damaged battery casing from the Japan Airlines Boeing 787 Dreamliner that caught fire at Logan International Airport in Boston, at the NTSB laboratory in Washington. The FAA failed to properly test the Boeing 787’s lithium-ion batteries and relied too much on Boeing for technical expertise, a new report from the National Transportation Safety Board says Thursday, May 22, 2014. (AP Photo/Manuel Balce Ceneta, File)

Tougher safety tests of the lithium-ion batteries used on Boeing Co.'s 787 Dreamliner and put in place after the plane's approval aren't good enough to ensure that the power packs won't overheat in flight, federal investigators have concluded.

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