As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER EACH FLIGHT, PILOT REPORTED HAD TO WIPE FUEL STAIN FROM TRAILING EDGE OF LT WING. INSPECTION OF LT FUEL BLADDER MADE AND FOUND HOSE CONNECTING TANK VENT LINE TO THE LT FUEL TANK WAS SPLIT AND ALLOWING FUEL TO VENT INTO THE WING BAY OUTBOARD OF LT TANK. THE AGE OF THE RUBBER HOSE WAS DETERMINED TO BE THE CAUSE OF FAILURE.