As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STEEL CHANNEL THAT SUPPORTS CABIN STEP WAS SEVERELY CORRODED AND CORROSION CARRIED THROUGH TO SKIN. STEP BEGAN TO BREAK THROUGH SKIN. SUBMITTER SUGGESTS STEP REMOVAL AND CLOSE INSPECTION OF SKIN. THERE IS NO WAY TO INSPECT CHANNEL UNLESS IT IS BEING REMOVED. SMALL DRAIN HOLE SHOULD BE PLACED FORWARD OF CHANNEL TO HELP PREVENT THIS.