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This thread is privately moderated by PittSpecial, who may elect to delete unwanted replies.
Jan 16, 2013, 06:46 PM
Right Rudder
PittSpecial's Avatar
Discussion

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

Jan 16, 2013, 07:17 PM
Registered User
pda4you's Avatar
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
Jan 16, 2013, 07:32 PM
Right Rudder
PittSpecial's Avatar
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.
Jan 16, 2013, 08:04 PM
Registered User
pda4you's Avatar
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
Jan 16, 2013, 08:09 PM
Right Rudder
PittSpecial's Avatar
Quote:
Originally Posted by pda4you
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.
Jan 17, 2013, 07:18 AM
Radio? Screwdriver!
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.
Jan 17, 2013, 08:13 AM
Registered User
pda4you's Avatar
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
Jan 17, 2013, 08:32 AM
Detroit 2-stroke junkie
1320fastback's Avatar
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.
Jan 17, 2013, 08:42 AM
Radio? Screwdriver!
Quote:
Originally Posted by pda4you
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.
Feb 18, 2013, 09:19 AM
Registered User
302 Z28's Avatar
There is a short article here on the AvWeb site. And here also.

Vince
Feb 18, 2013, 09:45 AM
Right Rudder
PittSpecial's Avatar
Check it out!

http://www.nbcnews.com/business/micr...says-1C8340259
Last edited by PittSpecial; Feb 18, 2013 at 09:52 AM.
Mar 02, 2013, 08:08 PM
Unregistered User
helipilot23's Avatar
That's what happens when u buy ur batteries from hobbyking.....


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