As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION, FOUND AFT CABIN UTILITY AREA FLOOR SUPPORT BETWEEN FR65-FR67, Y-308 UPPER FLANGE HOLES HAS CORROSION. BLENDED AFT CABIN UTILITY AREA FLOOR SUPPORT BETWEEN FR65-67 Y-308 IAW SRM 51-74-00. CHECKED LIMITS L=1.75" W=2.0" D=0.027".MAX ALL ALLOWABLE DAMAGE IS 0.016"FOUND TO BE OUT OF LIMITS IAW SRM 53 -00-14. REPLACED FLOOR SUPPORT IAW TRM 53-21-01 AND DWG 18D5341305.