As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRACKS FOUND IN SEAT (PLT) SUPPORT STRUCTURE BELOW FLOOR AT TOP SIDE OF GUSSETS INBOARD AND OUTBOARD SUPPORT. CRACKS WERE FOUND AT FLOOR LINE. SUBMITTER RECOMMENDED INSTALLING DOUBLERS INSIDE AT TOP AND AFT SIDES OF NEW GUSSETS OR MANUFACTURE GUSSETS OF HEAVIER GAUGE MATERIAL.