Originally Posted by
dayone
I was on an AA flight that was delayed because of a warning light of some kind. The captain said that before he called for maintenance, he would try one more thing. He shut down all power to the plane. We sat in the dark for about 30 seconds and then the plane powered back up. The warning light disappeared.
Had that on an Air Canada B789 once, alas it didn't work on that occasion and we got a new aircraft.