B777 flight crew experiences a fuel imbalance during a ferry flight over the pacific ocean. After re...

Attributes
ACN	1184574
Time
Date	201406
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZZ.ARTCC
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Oceanic
Flight Plan	IFR
Component
Aircraft Component	Powerplant Fuel System
Person 1
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 8000 Flight Crew Type 600
Person 2
Function	First Officer Pilot Not Flying
Experience	Flight Crew Last 90 Days 220 Flight Crew Type 8500
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Fuel Issue

Narrative:

Enroute during maintenance ferry we received an EICAS message of fuel imbalance; we executed the checklist and noted how long it should take to balance the fuel based on fuel flow. It took half the expected time to balance the fuel; also we received another message of fuel disagree; after electronic checklist execution we now felt we had a possible fuel leak. We notified the captain (who was on break) of the situation and he came to the cockpit. We inspected the left engine and noticed fuel was leaking from the fan section of the aircraft. We declared an emergency and initiated a turn towards a suitable diversion airport. We descended while executing the checklist which required engine shut down. We planned a single engine landing and the approach and landing were uneventful.

Original NASA ASRS Text

Title: B777 flight crew experiences a fuel imbalance during a ferry flight over the Pacific Ocean. After rebalancing a Fuel Disagree message is displayed and the electronic checklist indicates a fuel leak is likely. Fuel is visually confirmed to be coming from the left engine which is shut down and the flight diverts to a suitable airport.

Narrative: Enroute during maintenance ferry we received an EICAS message of fuel imbalance; we executed the checklist and noted how long it should take to balance the fuel based on fuel flow. It took half the expected time to balance the fuel; also we received another message of Fuel Disagree; After Electronic Checklist execution we now felt we had a possible fuel leak. We notified the Captain (who was on break) of the situation and he came to the cockpit. We inspected the left engine and noticed fuel was leaking from the fan section of the aircraft. We declared an emergency and initiated a turn towards a suitable diversion airport. We descended while executing the checklist which required engine shut down. We planned a single engine landing and the approach and landing were uneventful.

Data retrieved from NASA's ASRS site 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.