My first interpretation of what Boeing is proposing is that it is insufficient, does not address the core problems, and that , during an APU failure then the Battery back - up (28 - 32Vdc) does not provide a robust mitigation.
In terms of Functional Safety then I remain highly sceptical of their proposals with the real potential for Catastrophic consequences in the above scenario...
Read more (thanks to The New York Times) http://www.nytimes.c...r-787.html?_r=0
Boeing Discloses Fixes for Lithium-Ion...
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