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Old Jan 16, 2013, 07:46 PM
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Boeing 787 dreamliner


If you all have not heard, the Federal Aviation Administration (FAA) has grounded all 787 Dreamliner Aircraft until full investigation has been performed as to the reason for this!

More at:
http://www.cnn.com/2013/01/16/travel...html?hpt=hp_t1

Old Jan 16, 2013, 08:17 PM
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Another bad rap for Lithium batteries. They were ragging on them on NPR - and I am like how many passengers CARRIED THOSE ON to the airplane.

Sigh....

Mike
Old Jan 16, 2013, 08:32 PM
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Agreed, Cells phones, Laptops, Notebooks, and lets not forget Tablets!!!

However, the box in the picture is an Avionics Box that should be tested and tested again. There should be no reason for batteries to go out of control in a Aircraft.
Old Jan 16, 2013, 09:04 PM
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Any electrical component can fail. Boeing was required by the FAA to show since they were using Li batteries that the device could contain the fire. Looks like it worked.

Mike
Old Jan 16, 2013, 09:09 PM
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Originally Posted by pda4you View Post
Any electrical component can fail. Boeing was required by the FAA to show since they were using Li batteries that the device could contain the fire. Looks like it worked.

Mike
Oh, yes certainly, could imagine if those batteries were not contained, wow!

It would interesting what they find.
Old Jan 17, 2013, 08:18 AM
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Lithium Batteries don't like to be charged cold - i.e. below 0C. I wonder if this had some sort of heater on board, in between the cells to keep them warm?

After all it gets mighty chilly up at altitude...

Si.
Old Jan 17, 2013, 09:13 AM
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Simon - these are pretty sharp folks - I am confident they know the in's and out's of the battery technology. More important that charging they are really functionless at sub zero temps in putting out usable voltage. So I doubt very highly that temp is an issue - well under temp that is.

Mike
Old Jan 17, 2013, 09:32 AM
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Isn't this whole plane outsourced?
I believe these particular batteries come from a Japanese supplier.

Granted that Bowing designed them and it is Boeing that is on the hook for any faults with them.



Watching their stock closely.
Old Jan 17, 2013, 09:42 AM
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Originally Posted by pda4you View Post
Simon - these are pretty sharp folks - I am confident they know the in's and out's of the battery technology. More important that charging they are really functionless at sub zero temps in putting out usable voltage. So I doubt very highly that temp is an issue - well under temp that is.

Mike
Well I was thinking that they may have some sort of electrical heater to keep the cells warm. If that malfunctioned and thermal overload switches didn't catch it, then possibly cause a problem?

Or some sort of heat outlet was aimed at it? Or maybe an internal cell failure.

No doubt these packs were extensively tested, especially as Li-Ion is a new technology for Aviation with known safety risks. Also the cell manufacturers won't hesitate rejecting a cell that doesn't look 100%. However there obviously something that has failed and/or been overlooked when the packs were engineered.

The cells are made by GS Yuasa according to the NTSB report.

Si.
Old Feb 18, 2013, 10:19 AM
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There is a short article here on the AvWeb site. And here also.

Vince
Old Feb 18, 2013, 10:45 AM
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Check it out!

http://www.nbcnews.com/business/micr...says-1C8340259
Last edited by PittSpecial; Feb 18, 2013 at 10:52 AM.
Old Mar 02, 2013, 09:08 PM
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That's what happens when u buy ur batteries from hobbyking.....


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