As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON THRESHOLD PANEL AT R2 DOOR. REMOVED CORROSION ON TOP AND BOTTOM SKIN PER SRM 51-22-00. ALLOWABLE SKIN REMOVED FOR CORROSION CLEAN-UP EXCEEDS LIMITS AND THRESHOLD IS BER. REPLACED PANEL.