What was found
YYC - C4 LEFT NACELLE FIREWALL ABOVE OIL COOLER HAS CHAFING ON CENTER EDGE AND CRACK INTO PANEL. REPAIRED IAW DHC-8-200 SRM 51-40-11.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
YYC - C4 LEFT NACELLE FIREWALL ABOVE OIL COOLER HAS CHAFING ON CENTER EDGE AND CRACK INTO PANEL. REPAIRED IAW DHC-8-200 SRM 51-40-11.