As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL IMBALANCE EICAS, RTFL. AFTER AN HOUR FLT TIME FUEL IMBAL EICAS DUE TO LEFT TANK AT 68.1 COMPARED TO RIGHT AT 65.1. LEFT CLIMBED TO 68.9 THEN QUICKLY DROPPED TO 66 AND CLIMBED AGAIN TO 68.9. SAMC TEXT: TOT AND CALC WERE 1100 LBS DIFFERENT. TOT LESS THAN CALC UNTIL THE APPARENT VENTING AT 2 HOUR POINT. THEN OFF BY 3700 LBS.