As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB OUT, FUEL IMBALANCE WITH LEFT MAIN TANK SHOWING 800POUNDS LOW, WHICH WORSENED TO GREATER THAN 1000 POUNDS AND CAUSED IMBALANCE INDICATION. FOUND FOD IN THE FUEL TANKS, REMOVED FOD AND CLEAN TANKS; CHECK CONDITION OF ALL COMPONENT, NO DEFECT NOTED. PER AMM 28-11-00-410-801.