As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE IT WAS NOTED THAT THE LEFT WING TANK VENT TUBE AT WS. 629.00 IS CHAFED. FABRICATED DOUBLER FROM 2024-O .040 INCH DIM 4.0 INCH BY 3 INCH. INSTALLED REPAIR IAW DWG NR EDAG91-1. LEAK CHECK GOOD, NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE.