As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LETTER CHECK IN ATL, MAINTENANCE FOUND CORROSION ON THE C2 DOOR LOWER SILL OUTBOARD CHORD RUNNING THE LENGTH OF THE DOORWAY. THE CORROSION IS CONFINED TO THE .140- THICK VERTICAL FLANGE OF THE TEE CHORD AND HAS BEEN REMOVED BY BLENDING. THE DEPTH OF THE CORROSION RANGES FROM .004-. REMOVED TO .052- MAXIMUM. REPAIR MAJOR.