Supply tanks are different capacities, meaning #2 would flame out 90 to 180 seconds before #1.
Thinking through this unlikely scenario..
If one engine flamed out due to starvation, without warning, I presume it could stay airborn on a single engine?
If crew did not realise that the cause of the loss of power was a fuel indication issue (that would effect both engines) would they have tried to returned to base on the good engine?
Fuel exhaustion to one side, is there any common point where failure would stop fuel delivery in both engines, not necessarily simultaneously? I guess mechanically the systems are self contained for each engine, but can a Fadec fault or RF interference shut down both engines?
Rumours of Fadec failure occurring at Greek Olympics as a helicopter lifted from a very RF hostile area.
Mickjoebill