Originally Posted by
Dave Therhino
I'm only familiar with the 777 FBW, which has dedicated generators on the engine gearbox for the FBW system. That system will function if all normal AC power is lost, and even if standby DC is lost. I imagine the 787 and the Airbus systems are the same, but don't know that for a fact.
My former bosses tried extensively to have a complete electrical failure in the 777 simulator to create some kind of a scenario. I believe they got "pretty far", but the word I heard was "ridiculous" and I've never seen it in a recurrent afterwards...