Originally Posted by
tdracer
If Yuasa wouldn't accept there was a problem, why did they redesign the battery?
Because battery was never tested with multiple cells. Please don't call moving spacers a major redesign. Even DIY enthusiasts can figure out a better fix.
Originally Posted by
tdracer
Given there are over 400 787s currently flying around without battery problems, it looks like the battery redesign worked.
Well there was at least one reported incident in Japan, that battery was quietly replaced. No further info. Why not remove the dead weight of steel box. Airlines can save on fuel.
Originally Posted by
tdracer
they were unable to establish root cause, without knowing root cause they couldn't be confident of the fix.
Corrective action without establishing root cause. Which troubleshooting standard is this.