<< >> NASA ASRS Report 995201, February 2012

Because of a recurring fuel imbalance a B757-200 crew discovered that the left engine apparently developed a fuel leak in flight. An emergency was declared and the flight diverted to an enroute airport.

Attributes
ACN	995201
Time
Date	201202
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Fuel System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 16050
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 13000
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

En-route we noticed a fuel imbalance of approximately 1;400 pounds low on left side. We balanced the fuel and continued. We noticed fuel imbalance starting again (low on left side). We ran engine fuel leak procedure and asked deadheading captain to check evidence of fuel leak. He was unable to verify a leak. We declared an emergency and diverted to an en route airport. We were in an idle descent until final approach and did not notice additional increase in the imbalance at that time. We landed on runway 01L and shut down left engine after clearing the runway. The airfield rescue and firefighter crew said they saw evidence of a fuel leak and we pulled left fire handle. After cleared from airfield rescue and firefighter crew we taxied to remote parking and deplaned the passengers.

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Original NASA ASRS Text

Title: Because of a recurring fuel imbalance a B757-200 crew discovered that the left engine apparently developed a fuel leak in flight. An emergency was declared and the flight diverted to an enroute airport.

Narrative: En-route we noticed a fuel imbalance of approximately 1;400 LBS low on left side. We balanced the fuel and continued. We noticed fuel imbalance starting again (low on left side). We ran engine fuel leak procedure and asked deadheading Captain to check evidence of fuel leak. He was unable to verify a leak. We declared an emergency and diverted to an en route airport. We were in an idle descent until final approach and did not notice additional increase in the imbalance at that time. We landed on Runway 01L and shut down left engine after clearing the runway. The Airfield Rescue and Firefighter crew said they saw evidence of a fuel leak and we pulled left fire handle. After cleared from Airfield Rescue and Firefighter crew we taxied to remote parking and deplaned the passengers.

Data retrieved from NASA's ASRS site as of July 2013 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.