As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOOR STRUCTURE BETWEEN STA 380 AND STA 400 BL 0; INTERCOSTAL UPPER SUPPORT ANGLE CRACKED AT FASTENERS HOLES.<[01] REMOVED AND REPLACED INTERCOSTAL UPPER SUPPORT ANGLE AT MAIN CABIN FLOOR STRUCTURE BETWEEN STA 380 AND STA 400 BL0 PER B737-700 SRM 51-40-02-0G-0 AND DRWG #143A5400 SH 65 & 66.;[02] VERIFIED RII STEPS.