As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE PERFORMING INSPECTION IT WAS NOTED THAT THE LT WING TANK VENT LINE IS CHAFED AT CLAMP WBL 601.50. REPAIRED LT WING TANK FUEL VENT LINE AT WBL 601.50 IAW COTNEY ED NR EDAG52-1. FABRICATED DOUBLER FROM 2024 0.040 INCH DIM 1.625 INCH BY 4.250 INCH. INSTALLED DOUBLER AND PERFORMED LEAK CHECK, GOOD. NO OTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.