As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-15 CHECK INTERGRANULAR CORROSION WAS FOUND ON UPPER OF AFT CARGO COMPARTMENT FLOORBEAM AROUND NUT PLATES AT BS 727+5, LBL 3. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; CUTOUT DAMAGED SECTION OF FLOORBEAM BS 727+5, LBL 3; FABRICATED 2 EACH REPAIR ANGLES; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-00-53, FIG. 201.