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on Jun 15, 2017

...sigh! The manufacturer of battery and management mistakes missing from article. I guess I'll have to finish the article by adding a link to the facts.

NTSB faults Boeing, FAA and contractors for 787 battery fire

01 DECEMBER, 2014 - SOURCE: FLIGHTGLOBAL PRO - BY: JON HEMMERDINGER - WASHINGTON DC

flightglobal. com/news/articles/ntsb-faults-boeing-faa-and-contractors-for-787-battery-406624/

...The NTSB’s reports notes insufficient oversight down the regulatory-manufacturing chain – from the FAA to Boeing, from Boeing to battery designer Thales Group, and from Thales to the battery manufacturer, Japanese company GS Yuasa.

...In addition, Thales insufficiently oversaw GS Yuasa.

...“GS Yuasa did not test the battery under the most severe conditions possible in service, and the test battery was different than the final battery design certified for installation on the airplane,” says the NTSB.

The board says that during a visit to GS Yuasa it found that the company’s post-assembly battery inspections “could not reliably detect manufacturing defects” caused by foreign object debris generated during manufacturing.

Those defects can lead to short circuits, says the NTSB.

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