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					Originally Posted by  mykalberta
					 
				 
				I am not 100% sure, but I dont believe fuel powered generators are used. Most "fuel" that aircraft systems use comes in the form electricity being created by the Engine itself. Usually bleed air runs a turbine I believe. 
  
I dont believe its the case that there are gas fueled generators in the aircraft. Yes its a single point of failure, but if your engines die, you are likely dead and no backup system is of much use. 
			
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From the Air Transat glide flight which also was a A330.
On the Airbus A330, an emergency ram air turbine is deployed automatically to provide essential power for sensors and instruments to fly the aircraft.
http://en.wikipedia.org/wiki/Air_Transat_Flight_236
Makes you wonder if there was any glide time and if so why there was no communication during that time?