As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION, PASSENGER DOOR DRAIN GUTTER THRESHOLD BETWEEN FRAMES 36L TO 39L WAS FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE REMOVED AND REPLACED THE CORRODED PASSENGER DOOR DRAIN GUTTER THRESHOLD BETWEEN FRAMES 36L TO 39L IAW SRM.