As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - EXPERIENCED UNCOMMANDED FUEL TRANSFER IN FLIGHT. FUEL FEED OUT OF LEFT MAIN TANK. LANDED STL WITHOUT INCIDENT. FOUND REFUELING PANEL SWITCH GUARDS NOT CLOSING SWITCH. CLEANED AND LUBED SWITCH GUARDS AND ADJUSTED DOOR SWITCH RESTRICTOR BAR. PERFORMED CARD 28 96 01 WING FUEL IMBALANCE. SYSTEM GROUND CHECKED NORMAL OPERATION.