As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING HEAVY MAINTENANCE TECHNICIANS FOUND CABIN FLOOR STRUCTURE AT FR 87-88 WEB WITH CORROSION AROUND FASTENER HOLES RBL 24-38". FOUND TO BE OUT OF LIMITS PER SRM 53-23-10. REMOVED AND REPLACED WEB IAW SRM 51-40-08 AND ETD 2011-190/01333 REV C. A/C REMAINS IN HEAVY CHECK.