Previous thread discussed the 787's problems including the Ethiopian example which had an on board fire while parked at Heathrow.
The AAIB have today published a Special Report detailing their findings to date.
www.aaib.gov.uk/cms_resources.cfm?file=/S4-2014%20ET-AOP.pdf
Not absorbed all detail but it seems lithium batteries suffered a thermal runaway. Probable cause is wires being pinched/frayed and subsequent short circuit.
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