As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FUEL SPILL FROM ACFT WING SUMP VALVE JAMMED IN OPEN POSITION DURING FUELLING. APPROXIMATELY 1 LITER OF FUEL COVERING AREA 2 X 2.5 SQUARE METERS. SPILL CONTAINED AND ABSORBAL USED FOR CLEAN UP. FOUND DRAIN VALVE REQUIRED RESEATING, RESEATED DRAIN SUMP VALVE AND LEAK STOPPED. SUSPECT POSSIBLY ON PREVIOUS WATER SUMP DRAIN CHECK VALVE DID NOT SEAT PROPERLY.