As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A C-CHECK IN BNA, THE C-CHANNEL UNDER THE SERVICE DOOR THRESHOLD BETWEEN FS 38/39 WAS FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE REMOVED AND REPLACED THE C-CHANNEL UNDER THE SERVICE DOOR THRESHOLD BETWEEN FS 38/39 IAW SRM 51-25-01. (M)