As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FLOOR INTERCOSTAL BETWEEN STA 312 TO STA 328 LBL47 WL 208 CRACKED ARROUND THE SCREW HOLE<[01] LOCATED AND DRILLED CABIN FLOOR INTERCOSTAL FROM STA 312 TO STA 328; AT LBL 47 PER BOEING 737-800 SRM 51-40-02-0G-0;[02] REMOVED AND INSTALLED NEW INTERCOSTAL P//N 141A5410-12 AS PER SRM 51-40-02-0G-0 AND DRAWING 141A5400.;[03] VERIFIED STEPS COMPLETE