What was found
STL INFLIGHT DFW-MKE. CREW REPORTED DURING FUEL CHECK IN FLIGHT, FUEL QUANTITIES WERE ERRATIC. FLIGHT DIVERTED STL LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. CHECKED AIRCRAFT FUELING PANEL & FOUND LT HAND, RT HAND & CENTER TANK FUEL VALUES WERE OPEN MANUALLY FROM PREVIOUS FUELING. PERFORMED WING FUEL IMBALANCE CHECK IAW SECTION 12 CARD 28-96-01& ALL NORMAL. REPLACED LSDU ON RT WIND FUELING SYSTEM DUE TO PREVIOUS WRITE UP ON CIRCUIT BREAKER Z38 POPPED. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.