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 X281 BETWEEN STR 28S-29S AND WEB FWD SIDE BETWEEN STR 29S-30S HAVE CORROSION. MAINTENANCE REPAIRED IAW Q400 SRM 51-42-05-330-801, SRM 51-25-10-370-801 AND SRM 51-25-15-370-801.