As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTED FUEL SYSTEM AND ENGINES AND FOUND FUEL SEEPING FROM THE RT FORWARD FUEL VENT. APPLIED AIR BACK PRESSURE TO THE RT FORWARD VENT VALVE. TOPPED FUEL OFF AND FLEW AIRCRAFT. NO FUEL WAS LEAKING FROM THE RIGHT FORWARD VENT. SUSPECT VENT VALVE WAS STUCK OPEN.