As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE IS WAS NOTED THAT THE NR 2 ENGINE S DUCT HAS CORROSION ON THE LOWER INNER SKIN AT UPPER AFT CORNER OF DUCT ACCESS DOOR. CUT OUT DAMAGE DIM 9.25 INCH BY 5 INCH. FABRICATED DOUBLER FROM 7075-O .080 INCH DIM 16 INCH BY 11.5 INCH HEAT TREATED TO T6. FABRICATED FILLER FROM 2024 T3 .040 INCH DIM 9.25 INCH BY 5 INCH. INSTALLED REPAIR, NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE.