U.S. tries new line of inquiry in Boeing battery probe

So NTSB has already put a finger on the root cause of the 787 problems, the batteries. And what's GS Yuasa's and the J-government's stand in this?

And considering that ANA is asking Boeing to pay for lost income?

I'll answer that question for you. "Shoganai"

Definitely not a new line of inquiry.

I wrote the following, here on JT, three weeks ago on January 23rd; Quote: "Well, if they are going to run these batteries, then as a safety measure perhaps they should all be pulled out and swapped over for fresh/checked ones, every six months. (Or however long it takes before potentially fatal short-circuiting dendrites form inside.)"

Found that info on dendrites on a professional site, so I cannot believe this is a 'new' idea.

In other words, nothing new here.

nandakandamandaFeb. 13, 2013 - 02:11PM JST

Found that info on dendrites on a professional site, so I cannot believe this is a 'new' idea.

NTSB has been investigating that from the start, well, dendrites, contaminated electrolyte, and separator film damage. Considering their past releases they were just getting rid of all other possibilities until the preliminary lab results were back. Only the Japanese investigators and Japanese/French press have stated it couldn't be the batteries, yet constantly had to retract their statements when the NTSB releases it's weekly reports.

Japan's Yuasa made the batteries - what sort of cooperation are they extending?

This issue is not about countries. It's about finding the cause and eliminating it. Until that happens, ALL the parts suppliers for the 787 are taking losses while production of the aircraft is halted.

Only the Japanese investigators and Japanese/French press have stated it couldn't be the batteries,

Can't forget the certain protected armchair experts who determined the entire plane was unsafe despite the NTSB only finding the batteries at fault.

Most of the contributory information now seems to be in, and the questions will be how far do they have to alter the parameters on these batteries (accessibility, maintenance check-sheets, total size/weight, internal separators, spacing, charging and balancing subsystems, fire-suppression, failsafe back-ups, etc.) in order to get re-certified, and more importantly when can they get back into the air.