Narrative:

Approaching X airway on nat track system at about XA40Z -- oil pressure on left engine went to zero, followed by rising oil temperature. While executing loss of oil pressure checklist, engine failed. While starting a drift-down, the track was departed, and the engine failure checklist completed. We offset 30 mi north of the track and got a clearance to proceed to ZZZZ from ZZZZ oceanic. The oil quantity remained at 20 for the rest of the flight and the engine continued to windmill with no vibrations. An emergency was declared with ZZZZ oceanic and to the ZZZ tower, and the crash fire rescue equipment equipment was ready for us. The WX was VFR at ZZZ, when we landed at XC12Z.

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Original NASA ASRS Text

Title: A B777 IN CRUISE AT FL390 DECLARED AN EMER AND DIVERTED DUE TO L ENG LOSS OF OIL PRESSURE AND HIGH TEMP.

Narrative: APCHING X AIRWAY ON NAT TRACK SYS AT ABOUT XA40Z -- OIL PRESSURE ON L ENG WENT TO ZERO, FOLLOWED BY RISING OIL TEMP. WHILE EXECUTING LOSS OF OIL PRESSURE CHKLIST, ENG FAILED. WHILE STARTING A DRIFT-DOWN, THE TRACK WAS DEPARTED, AND THE ENG FAILURE CHKLIST COMPLETED. WE OFFSET 30 MI N OF THE TRACK AND GOT A CLRNC TO PROCEED TO ZZZZ FROM ZZZZ OCEANIC. THE OIL QUANTITY REMAINED AT 20 FOR THE REST OF THE FLT AND THE ENG CONTINUED TO WINDMILL WITH NO VIBRATIONS. AN EMER WAS DECLARED WITH ZZZZ OCEANIC AND TO THE ZZZ TWR, AND THE CFR EQUIP WAS READY FOR US. THE WX WAS VFR AT ZZZ, WHEN WE LANDED AT XC12Z.

Data retrieved from NASA's ASRS site as of July 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.