As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK DISCREPANCY AS FOLLOWS, IN FWD CARGO AFT 640, STR 23R HAS CORROSION. REMOVED SECTION OF STRINGER. FABRICATED A NEW SECTION OF STRINGER IAW B-727 SRM 53-10-3 FIG 1 AND SRM 53-10-2. INSTALLED NEW STRINGER AND SPLICE IAW B-727 SRM 53-10-3 FIG 1.