As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, EXCESSIVE FUEL MIGRATION FROM THE LEFT MAIN TO THE CENTER FUEL TANK. REMOVED AND REPLACED FUELING SHUT-OFF VALVE IAW 28-21-02. REMOVED AND REPLACED VALVE CONTROL UNIT IAW 28-21-12. PERFORMED OPS CHECK AND LEAK CHECK IAW 28-11-00. NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.