Now can anyone tell me if both the power buses failed if that would effect the engines in this way?.
I can't claim any B777 specific knowledge, but interesting question nonetheless as we are talking about an aircraft with FADEC.
So, at the risk of starting a Red Herring swimming, it's worth noting that there have been at least 12 reported incidents of power supply disruption on type, 3 of them classed as Major by Investigators, as detailed in
AAIB SB/2007/2 ...