PPRuNe Forums - View Single Post - 787 Batteries and Chargers - Part 1
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Old 2nd Mar 2013, 21:58
  #832 (permalink)  
FlightPathOBN
 
Join Date: Mar 2011
Location: engineer at large
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"A Boeing presentation in February described "baking the battery to induce overheating, crush testing and puncturing a cell with nail to induce short circuit."

At the same time the FAA approved the special conditions in 2007, FAA staff and the aircraft manufacturing industry, including Boeing, were devising lithium-ion battery tests that included all the details the special conditions lacked.

Published in 2008 and adopted by the FAA three years later, the standard known as RTCA DO-311 gave precise instructions for tests. The worst-case-scenario test required turning off all failsafe electronics, short-circuiting the battery and watching for flames for three hours.

Boeing did not run those tests. "The RTCA standards were not designed for the 787," and Boeing provided extensive testing to show the 787 met the special conditions, spokesman Marc Birtel said.

The FAA acknowledged the batteries were potentially flammable in the special conditions approved. Said former Inspector General Schiavo, "They knew they had problems. They just said 'OK.'""

Insight: Will Dreamliner drama affect industry self-inspection? | Reuters
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