As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING AN INSPECTION, DISCOVERED CORROSION OF HARDWARE AND PITTING IN THE BORE OF THE ATTACH POINT ON THE RT WINGLET. BEYOND THE MFG LIMITS. CORROSION WAS DUE MOISTURE INTRUSION THROUGH THE SEALANT COVERING THE ATTACH POINTS.