The question of interest is whether the fuel levels resulted in the engine failure, or whether there was an engine failure, with the additional factor that they were running short of fuel. (Does reported fuel exhaustion = fuel starvation for one engine?)
Do you have any updated information which shows "fuel starvation"? If so, it completely changes the dynamics and meaning of the incident.
With the "engine failure", the reason could range from having a warning light go on (as per a recent Westjet diversion to Winnipeg), to something more serious. If something went mechanically wrong with the engine, it has one implication. If it was starved of fuel there are other implications - ie., was it a potential "Gimli Glider"?
Thanks