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Old 20th Feb 2013, 18:46
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RR_NDB
 
Join Date: Feb 2011
Location: Nearby SBBR and SDAM
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Small advances in JTSB investigation

Hi,

FlightPathOBN:
rough translations:


Thank you!

Red 'star' indicates: The positive electrode current collector (Blown)
Red text at upper right states: Safety valve on 7 and 2 open
The model i constructed in my mind in last weeks is being reviewed in light of this findings.

Anyway:

Can be seen mark and damage the high temperature in the vicinity of the positive terminal of the cell element 3
Damage to one of the electrodes. Cells 3
• I considered damaged from heat.
• Why has occurred a trace of damage including damage surveys continue
2 blowout of the current collector.
that a large current flows in the current collector, the temperature reached the cell Allowed, such as the positive electrode current collector that has been heated by thermal runaway in Be considered potential Blown ground wire out of the box
All this this reinforces my model. A short of cell # 3 tip to battery case (and to a/c ground).

blown found in the positive electrode current collector of the cell 1, 2, 3 and 8
No idea on why blown in # 8

is considered likely that the blown current flows through the outer box.
In addition, there was no record of the history of a lightning strike to the aircraft
Investigators will conclude current from internal short circuit to case blowed aircraft harness ground wire of MAIN battery.

I expected this conclusion from them before. Explanation may be they concentrated on cells analysis.
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