ACR WDB DEVELOPED A FUEL LEAK ON AN EXTENDED OVERWATER FLT. FLT CREW DIVERTED TO ALTERNATE WHEN LEAK COULD NOT BE CONTROLLED WITH BOTH ENGINES OPERATING.

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DETECTED ABNORMAL FUEL USAGE OVER CATCH. F/O VIS CHK OF R WING CONFIRMED LEAK. ISOLATED R INNER TANK. SUBSEQUENTLY DETECTED ABNORMAL FUEL USAGE FROM L INNER TANK. SECOND VIS CHK BY F/O INDICATED NO LEAK FROM L WING BUT FURTHER CHK OF R WING INDICATED A POSSIBLE FUEL LEAK FROM THE R ENG. DECLARED AN EMER AND DIVERTED TO BERMUDA. SHUT DOWN R ENG AND PULLED FIRE HANDLE. FUEL LEAK APPEARED TO CEASE. COMPLETED ALL APPROPRIATE CHKLISTS. LANDED AT BERMUDA UNEVENTFULLY. THIS WAS A MECHANICAL FAILURE OF A FUEL PUMP. I HAVE NO SUGGESTION ON HOW TO PREVENT THIS PROB. HOWEVER; AS A CONTRIBUTION TO SAFETY; I FEEL THAT WE SHOULD HAVE BETTER COM IN THE CARIBBEAN OPERATION. IT TOOK AN EXCEEDINGLY LONG TIME TO GET A CLRNC. WE HAD TO DECLARE AN EMER AND START A DSCNT WITHOUT A CLRNC. WE MAINTAINED A VERY STRICT TFC WATCH IN VMC BUT CLOSER COORD WITH OCEANIC CTL WOULD CERTAINLY HELP. CALLBACK CONVERSATION WITH RPTR REVEALED FOLLOWING. THIS WAS AN INAUGURAL FLT FOR THIS ACFT ON THE JFK/SJU RTE. FLT CREW CONSISTED OF ACFT PROJECT MGR AND A CHK PLT. POST-FLT INSPECTION REVEALED A HOLE IN THE FUEL PUMP CASE CAUSED BY FOD. PUMP WAS RETURNED TO MANUFACTURER BUT THEY HAVE NOT BEEN ABLE TO DETERMINE THE SOURCE OF THE OBJECT THAT DAMAGED THE PUMP. NO OTHER PUMP DAMAGE OR PROBS RECORDED FOR THIS ACFT TYPE THROUGH TWO YEARS OF OPERATION.