[JohnG45]

If the cause was really the faulty wiring in the center fuel tank of the plane, why weren’t Boeing 747s grounded world-wide to correct the problem?

[Carriage Hill]

BINGO! Now they take a worldwide fleet of 787s out-of-service because of a warm battery?

[wbill]

Yep. Truly, that is the dog that didn't bark. Look what happened to the 787s.....They might maybe possibly have a problem with a batttery, or not, so the whole fleet got grounded until it was sorted out.

If there was an issue, the 747s would have been grounded just from a liability / insurance perspective.