As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LTPR NR 5001337969-0010_AIRCRAFT WAS NOT GROUNDED AND IS IN CHECK FOR SCHEDULED MX. DURING INSPECTION OF THE AFT CABIN FLOOR STRUCTURE A CRACK WAS FOUND ON LH SHEAR PLATE BETWEEN FR 69 TO FR 70. REPLACEMENT IS REQIURED. PERFORMED REPLACEMENT OF LH SHEAR PLATE BETWEEN FR 69 TO FR 70 IAW-SRM-51-72-11-REV 41. MX ACTION IS ACCEPTABLE.