AN EXTENDED RANGE WDB CREW HAD A LOSS OF 1 GENERATOR; THEN THE APU. THEY LANDED WITHOUT FURTHER INCIDENT AT AN ENRTE FIELD.

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THE FLT WAS ENRTE FROM ORD TO ZRH. THIS WAS A WDB ON AN EXTENDED RANGE OVERWATER FLT. APPROX OVER YUL; THE FLT CALLED AND ADVISED ONE OF THE ENG DRIVEN GENERATORS HAD FAILED. AT THAT TIME; I CONTACTED MAINT AND THEY SUGGESTED WE LAND THE ACFT SHORT. I THEN REFERRED TO THE ACFT OPERATING MANUAL AND DETERMINED THE FLT COULD CONTINUE. I RELAYED THIS TO THE CREW AND THE CAPT CONCURRED. JUST PRIOR TO THE OVERWATER PORTION; THE FLT AGAIN CONTACTED ME AND ADVISED THE EICAS WAS DISPLAYING AN INTERMITTENT STATUS MESSAGE ON THE APU OIL QUANTITY. I CALLED MAINT AND THEY ADVISED THERE WAS A HISTORY OF OIL PROBLEMS WITH THE APU. THEY AGAIN SUGGESTED WE LAND SHORT. I CONTACTED THE FLT AND ADVISED THE CREW OF THE HISTORY ON THE APU. AT THAT POINT; I SUGGESTED LNDG AT JFK. THE CAPT FELT COMFORTABLE TO CONTINUE. WE THEN DISCUSSED OUR OPTIONS SHOULD THE APU FAIL. APPROX 300 NM FROM THAT POINT; THE APU FAILED. THE CAPT DECLARED AN EMER AND DIVERTED TO YYR. IT IS MY OPINION THAT THE CAPT AND I MADE SOUND DECISIONS AND OPERATED THE FLT SAFELY AND LEGALLY.