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 YUL, THE NR 3 AND 4 CAM GUIDES OUTBOARD ON THE LEFT INBOARD FLAPS WERE FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE REMOVED AND REPLACED THE NR 3/4 CAM GUIDES OUTBOARD ON THE LEFT INBOARD FLAP IAW AMM 20-21-12. (M)