As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION NOTED FRETTING CORROSION AND PITTING CORROSION UNDER NUT PLATES ON THE PANEL MOUNTING TANG OF THE KEELBEAM, LOWER OTBD CHORD. BLENDED OUT OF LIMITS. REPAIRED IAW TASS DOCUMENT 121058-R021, REV 5, REF MCO 0001002513, WO 1320443.