More problems with Boeing's 787

Federal regulators now believe two different incidents with the Dreamliner's battery had different causes, which further complicates their investigation.

The National Transportation Safety Board revealed not all of the problems have been the same from all the flights that were affected like originally thought.

In one case, the battery was overcharged and in another case, it wasn't charged.

This all means that the investigation has become a lot more complex and will likely delay the Dreamliner's return to the air.

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