37000 Feet

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B777 flight crew is informed of a possible fuel leak on the left engine by dispatch; whom was in turn informed by a company pilot observing the departure from the ground. Fuel monitoring and visual inspection verify a leak and the flight returns to departure airport.

Narrative:

A vapor trail was observed coming from out left engine. After visually confirming it and verifying that our left engine was in fact burning more fuel than the right we elected to return and land overweight. We declared and emergency and landed uneventfully. The fuel pump was in fact leaking badly.

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Original NASA ASRS Text

Title: B777 flight crew is informed of a possible fuel leak on the left engine by Dispatch; whom was in turn informed by a company pilot observing the departure from the ground. Fuel monitoring and visual inspection verify a leak and the flight returns to departure airport.

Narrative: A vapor trail was observed coming from out left engine. After visually confirming it and verifying that our left engine was in fact burning more fuel than the right we elected to return and land overweight. We declared and emergency and landed uneventfully. The fuel pump was in fact leaking badly.

Data retrieved from NASA's ASRS site as of April 2012 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.