As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YYC: FUSELAGE INTERIOR UNDERFLOOR, FUSELAGE FRAME TO SKIN FLANGE AT STA X644 BETWEEN STR 31S-32P HAVE CORROSION AND AFT SIDE OF FRAME WEB BETWEEN STR 32S-32P HAVE CORROSION. MAINTENANCE REPAIRED IAW Q400 SRM 51-42-05-330-801, SRM 51-21-00-350-801, SRM 51-25-10-370-801 AND SRM 51-25-15-370-801.