U.S., Japan analyze Dreamliner black box

National Jan. 20, 2013 - 06:45AM JST ( 5 )

The requested article has expired, and is no longer available. Any related articles, and user comments are shown below.

Order by Time Order by Popularity

5 Comments

-4

basroilJan. 20, 2013 - 12:34PM JST

GS Yuasa, the Japanese company that made the battery installed in the ANA Dreamliner, said the probe into the incident could take weeks.

Wrong, Yuasa makes ALL 787 batteries under contract from Thales SA, not just ANA's planes.
3

ebisenJan. 20, 2013 - 10:21PM JST

GSYuasa is not the system integrator, but Thales SA. As such, the responsibility for choosing the parts and ensuring they all work together with no such problems lies entirely with Thales. I wonder why is the GS Yuasa brought on again and again. FYI, Yuasa is a very respected manufacturer of Li-Ion battery CELLS for aerospace, with millions of usage hours without problem in hundreds of satellites.

If Thales can't use Yuasa's cells properly, I this it's Thales' fault.
0

Kobuta ChanJan. 21, 2013 - 01:40AM JST

I doubt about faulty Battery issue but most possibly fault in Charger or Electronic control system.
-1

Larry WoodworthJan. 21, 2013 - 01:43AM JST

Wrong, Yuasa makes ALL 787 batteries under contract from Thales SA, not just ANA's planes.

Uhh... how is their statement "wrong"? The battery that failed was in an ANA Dreamliner and the failed battery in the ANA Dreamliner was made by Yuasa. The statement is 100% correct.

GSYuasa is not the system integrator, but Thales SA. As such, the responsibility for choosing the parts and ensuring they all work together with no such problems lies entirely with Thales. I wonder why is the GS Yuasa brought on again and again. FYI, Yuasa is a very respected manufacturer of Li-Ion battery CELLS for aerospace, with millions of usage hours without problem in hundreds of satellites.

GSYuasa is the manufacturer of parts that failed catastrophically on two different planes. Thales SA cannot open up each battery to make sure it was made to specification because the batteries are sealed. Therefore, they have to rely on Yuasa to make them right. I would imagine there is nothing in the design of the battery circuitry that would as a rule cause the batteries to swell and burn. What CAN cause them to swell and burn, however, is shoddy manufacturing processes. THAT is why GS Yuasa is being brought up regularly. Until the actual determination has been found, they are a prime suspect for the cause of these failures. I imagine any GS Yuasa batteries that were made about the same time are being collected and disassembled to see if impurities found their way into the batteries.
0

The passageJan. 21, 2013 - 11:31AM JST

@Larry

You might want to check this article just posted -http://www.japantoday.com/category/national/view/u-s-probe-of-dreamliner-fire-finds-battery-did-not-overheat

Jumping to conclusions before investigations are complete is very rife on these pages. Unfortunately we don't know what caused the issue which is why the aircraft are still grounded.