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 RIGHT WING TANK VENT TUBE AT WS 686.50 IS CHAFED. FABRICATED DOUBLER FROM 2024-0 DIM 3.5 INCH BY 3 INCH. INSTALLED REPAIR IAW COTNEY DWG NR EDAG91-1. LEAK CHECK GOOD, NO OTHER DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.