Narrative:

En route from copenhagen, denmark (cph) to bos on xxco flight. A discrepancy began to develop in our fuel score between fuel used and quantity remaining. After beginning tank to engine operation, we determined the problem was with the #2 tank (engine system). After checking center of gravity limitations we transferred all but 10,000 pounds of fuel from tank 2 to tanks 1 and 3. The leak rate remained steady at about 2800 pounds/hour. We communicated via phone patch with dispatch and maintenance control to advise them of our situation. We felt the leak was likely at the #2 engine. At this time, another, our company flight, also on track 3 and 2000' below us, called on the chatter frequency (131.8) to advise us of their position. We asked them to visually inspect the #2 engine (not visible to us on board our aircraft). They advised sighting a vapor trail from the #2 engine. We obtained a clearance (only by declaring an emergency due to the proximity of our company flight) and descended to 290 while maintaining visual separation from company flight. #2 engine was shut down per the checklist and the leak stopped. Approximately 300 NM northeast of bos we diverted to bangor, me (bgr). An earlier divert was ruled out due to poor IFR WX conditions at suitable canadian alternates. We attempted to restart the #2 engine during the descent to bangor without success. We called for emergency equipment to stand by at bgr and landed there without incident. The fuel leak was in a line to the #2 engine variable stator vanes. (Hydraulically operated with fuel as the medium). The only way to stop this leak is by engine shut down.

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Original NASA ASRS Text

Title: FLT CREW OF WDB DETECTED FUEL LEAK ON ATLANTIC CROSSING, SHUT DOWN ENGINE, DECLARED EMERGENCY, DESCENDED, DIVERTED TO ALTERNATE ARPT.

Narrative: ENRTE FROM COPENHAGEN, DENMARK (CPH) TO BOS ON XXCO FLT. A DISCREPANCY BEGAN TO DEVELOP IN OUR FUEL SCORE BETWEEN FUEL USED AND QUANTITY REMAINING. AFTER BEGINNING TANK TO ENGINE OPERATION, WE DETERMINED THE PROBLEM WAS WITH THE #2 TANK (ENGINE SYSTEM). AFTER CHECKING CENTER OF GRAVITY LIMITATIONS WE TRANSFERRED ALL BUT 10,000 LBS OF FUEL FROM TANK 2 TO TANKS 1 AND 3. THE LEAK RATE REMAINED STEADY AT ABOUT 2800 LBS/HR. WE COMMUNICATED VIA PHONE PATCH WITH DISPATCH AND MAINT CTL TO ADVISE THEM OF OUR SITUATION. WE FELT THE LEAK WAS LIKELY AT THE #2 ENGINE. AT THIS TIME, ANOTHER, OUR COMPANY FLT, ALSO ON TRACK 3 AND 2000' BELOW US, CALLED ON THE CHATTER FREQ (131.8) TO ADVISE US OF THEIR POSITION. WE ASKED THEM TO VISUALLY INSPECT THE #2 ENGINE (NOT VISIBLE TO US ON BOARD OUR ACFT). THEY ADVISED SIGHTING A VAPOR TRAIL FROM THE #2 ENGINE. WE OBTAINED A CLRNC (ONLY BY DECLARING AN EMER DUE TO THE PROX OF OUR COMPANY FLT) AND DESCENDED TO 290 WHILE MAINTAINING VISUAL SEPARATION FROM COMPANY FLT. #2 ENGINE WAS SHUT DOWN PER THE CHECKLIST AND THE LEAK STOPPED. APPROX 300 NM NE OF BOS WE DIVERTED TO BANGOR, ME (BGR). AN EARLIER DIVERT WAS RULED OUT DUE TO POOR IFR WX CONDITIONS AT SUITABLE CANADIAN ALTERNATES. WE ATTEMPTED TO RESTART THE #2 ENGINE DURING THE DESCENT TO BANGOR WITHOUT SUCCESS. WE CALLED FOR EMER EQUIPMENT TO STAND BY AT BGR AND LANDED THERE WITHOUT INCIDENT. THE FUEL LEAK WAS IN A LINE TO THE #2 ENGINE VARIABLE STATOR VANES. (HYDRAULICALLY OPERATED WITH FUEL AS THE MEDIUM). THE ONLY WAY TO STOP THIS LEAK IS BY ENGINE SHUT DOWN.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.