As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN FLOOR PANEL, R4 DOORWAY THRESHOLD AFT DRAIN HOLE BRACKET CORRODED AT FASTENER. CORROSION ON ORIGINAL BRACKET FOUND TO BE OUT OF LIMITS. REMOVED AND REPLACED WITH NEW BRACKET I.A.W. DRAWING# 146N5246 REV D. ORIGINAL METAL THICKNESS .071 AFTER BLENDING .030 REMAINS.