Narrative:

At approximately 100 mi west of fezek intersection, we noticed the fuel was approximately 800 pounds out of balance with 500 pounds in the center tank that was not there at takeoff. We started to balance the fuel xfeeding from the left engine. The flight attendant called the flight deck reporting a loud noise, which we heard also, like a bang resembling a compressor stall. Simultaneously, we got a 'right engine eec power' EICAS advisory with an 'altitude light' illuminating on the overhead. We then noticed a fluctuation of the primary engine instruments then a stabilization back within normal ranges. After consulting the flight manual, we called dispatch and conferenced maintenance on the call. He said he took data of the engine. We continued to lax without incident in the altitude mode of the right eec. We left a report in the logbook as per maintenance request.

Related reports:

Google
 

Original NASA ASRS Text

Title: B767 FLT CREW HAS THE R EEC FAIL WHILE ENRTE.

Narrative: AT APPROX 100 MI W OF FEZEK INTXN, WE NOTICED THE FUEL WAS APPROX 800 LBS OUT OF BAL WITH 500 LBS IN THE CTR TANK THAT WAS NOT THERE AT TKOF. WE STARTED TO BAL THE FUEL XFEEDING FROM THE L ENG. THE FLT ATTENDANT CALLED THE FLT DECK RPTING A LOUD NOISE, WHICH WE HEARD ALSO, LIKE A BANG RESEMBLING A COMPRESSOR STALL. SIMULTANEOUSLY, WE GOT A 'R ENG EEC PWR' EICAS ADVISORY WITH AN 'ALT LIGHT' ILLUMINATING ON THE OVERHEAD. WE THEN NOTICED A FLUCTUATION OF THE PRIMARY ENG INSTS THEN A STABILIZATION BACK WITHIN NORMAL RANGES. AFTER CONSULTING THE FLT MANUAL, WE CALLED DISPATCH AND CONFERENCED MAINT ON THE CALL. HE SAID HE TOOK DATA OF THE ENG. WE CONTINUED TO LAX WITHOUT INCIDENT IN THE ALT MODE OF THE R EEC. WE LEFT A RPT IN THE LOGBOOK AS PER MAINT REQUEST.

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.