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 INTERCOSTALS BETWEEN FS 39 TO FS 40 ON THE LEFT AND RIGHT SIDES WERE FOUND TO BE CORRODED BEYOND LIMITS. MAINTENACNE REMOVED AND REPLACED THE INTERCOSTALS BETWEEN FS 39 TO FS 40 ON THE LEFT AND RIGHT SIDES IAW SRM 51-25-01. (M)