As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: UNWANTED FUEL TRANSFER FROM RIGHT WING TO LEFT WING WITH CROSS FEED VALVE INDICATING CLOSED. ONCE CENTER TANK DRY HAD 400 LBS/HR INCREASE BURN FROM RIGHT TANK. INCREASED TO 600 LBS/HR. APPROX. 3000 LB IMBALANCE LAST THREE HOURS OF FLIGHT. **ORIGINAL REPORT AALA202109284213**: REPLACED AUXILIARY LEVEL SENSING CONTROL UNIT AND REFUEL PRESELECTOR PER AMM 28-46-35 AND AMM 28-42-21. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.