Incident: LATAM B773 near Belo Horizonte on Dec 20th 2018, electrical failures
I think this is probably the only unthinkable total power loss on a Wide Body ETOPS Boeing Twin (not engine failure induced) that happened to a LATAM 777 - An amazing demonstration of airmanship from the crew, and a demonstrated design feat of the Boeing allowing the aircraft to continue flying at or near TO weight and then land (albeit heavy) even though they had lost all normal sources of electrical power, and then some ...
357 pax and crew safely disembarked without injury.
It is also worth noting that FADEC is a concept (or system) of many many independent and redundant engine control components from the EEC and Thrust Levers, to the Dedicated Alternators, FMU's, VSB/VBV actuators and so on. They are all independent of the aircraft power sources hence the engines will operate just fine even in a situation such as this.
Edited to add: Refer to the previous pprune forum (
LATAM B773 complete electrical failure?)