Another poster disagreed and offered as evidence no visible Rudder input. Assuming some manner of auto flight response, wouldn't that demonstrate operable FADEC?
I don't really understand this. FADECs don't command the rudder; flight computers do. Flight computers also command the FADEC to increase/decrease thrust for thrust asymmetry protection, not the FADEC doing it itself.
The procuring cause of loss of engine power had to be loss of electrical power.
...and it is an express certification condition that the latter cannot lead to the former. Hence FADEC alternators, FADEC powered thrust lever angle resolvers, suction feed etc.
The batteries are basically not used while engine(s) are running.
I can't comment on presence/absence of yaw.