As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: 50 MINUTES INTO FLIGHT LEVEL AT CRUISE ALTITUDE. "FUEL IMBALANCE EICAS MESSAGE. CENTER TANK PUMPS ON FUEL 7500 LBS BURNED 100 LBS/MIN OUT OF LEFT MAIN FUEL TANK W/BOTH LEFT MAIN TANK PUMPS ON FUEL IMBALANCE WAS 4200 LBS. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)