As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, FOUND LEVEL 2 CORROSION ON SKIN UNDER AFT END 'C' BELLY DOOR SILL PROTECTOR. REMOVED SCUFF PLATE. CUT OUT DAMAGED SECTION OF SKIN. FABRICATED AND INSTALLED FILLER, DOUBLER AND TRIPLER IAW SRM 51-1-8 AND 5-1-16 PER DER DWG ARW 950051-5100.