As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LTPR NR 5001337970-0010_AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING INSPECTION OF THE AFT CABIN FLOOR STRUCTURE FOUND CORROSION ON RH SHEAR PLATE BETWEEN FR 69 TO FR 70 .REPLACEMENT IS REQUIRED. PERFORMED REPLACEMENT OF RH SHEAR PLATE IAW-SRM-51-72-11-REV 41, MX ACTION IS ACCEPTABLE.