As a sim pilot, I know just enough to appreciate this. I thoroughly enjoyed this, thank you.

What year was that done?

Boeing has called for all 787 customers so far to immediately check all their Dreamliners delivered so far over the wrong wiring in the fire extinguisher system.

About 1981 I think. :yep:

Obviously this is a pretty ridiculous mistake to make and it seems inconceivable that a company with Boeings long history doesn't have the appropriate final inspection to have kept this from happening. Of course they do have something in place but what was different about the 787 that allowed such a error to occur? Or has something similar happened in the past?

The 787 is the mostr electrified jet ever. Classical, hydraulic, mechnaical systems have been repalced with e-system and e-motors to a much wider degree than in any other airliner in service today or in the near future.

They wennt too fast, too far ahead with that. And with a misdesigned electrical and especially battery system. The battery problems result from the hugely increased demand for electrical power aboard these airplanes. They needed much more batteries to be build in, and with higher capacity if possible. But the batteries they used, did not fulfill that demand. Plus their technology in itself is a more risky technology than other battery types (with lower capacity).

And so they are where they are.

You will never see me boarding any of these planes. I do not trust the design by its very philosophy and components chosen.