As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YUL - DURING CONTINENTAL EXPRESS C-CHECK INSPECTION, THE WING BOX INTERCOSTAL AT STRINGER 1 LEFT WAS FOUND TO BE CRACKED BETWEEN FRAMES 23 & 24. MAINTENANCE REMOVED AND REPLACED THE AFFECTED INTERCOSTAL IN ACCORDANCE WITH ATR42-320 SRM 51-25-01, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.