As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN CENTER AISLE FLOOR SUPPORT BREAK CRACKED @ RBL- 1 STA 540 MKD DOT<[01] REMOVED AND INSTALLED NEW FLOOR SUPPORT BREAK PANEL (CHANNEL) AT MAIN CABIN CENTER AISLE STA 540; FROM RBL 1 TO RBL 21 AS PER B737-700 SRM 51-40-02-0G-0; DWG# 143A0060.;[02] VERIFIED STEP 1 FINAL