As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GROUND RUN, DETECTED FUEL SMELL IN COCKPIT. REMOVED FORWARD FLOOR PANS AND OBSERVED FUEL PUDDLE AND STAIN. INSPECTION REVEALED STAINING ON RESERVOIR TANK. DEFUELED AIRCRAFT AND REMOVED RESERVOIR TANK. STRIPPED PAINT FROM SUSPECTED CRACK AREA. DYE PEN INSPECTION REVEALED 1 INCH CRACK ON LOWER AFT WELD BEAD. REPLACED WITH NEW PART, SUSPECTED CAUSE: STRESS DUE TO UPPER MOUNT HOLE NOT ALIGNED WITH NUT PLATE.