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 FOR AALA202110213476: REPLACED LEFT HAND CENTER TANK OVER RIDE PUMP AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 28-22-06.** (CLOSED)