As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED MAINTENANCE VISIT, LEVEL 2 CORROSION WAS DISCOVERED ON A FLOOR SUPPORT LOCATED IN THE AFT CARGO BAY AT FS 772 LBL 5. REMOVED THE CORRODED SECTION OF FLOOR SUPPORT, FABRICATED AND INSTALLED NEW REPAIR SECTION IAW BOEING 737 SRM 53-10-5 FIGURE 6. (M)