What was found
YYC - C4 LEFT HAND NACELLE FIREWALL AT XN121 IS CRACKED AT ZN-1.0 AND OUTBOARD YX 12.0. REPAIRED IAW RD 8-54-806 ISSUE 8.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
YYC - C4 LEFT HAND NACELLE FIREWALL AT XN121 IS CRACKED AT ZN-1.0 AND OUTBOARD YX 12.0. REPAIRED IAW RD 8-54-806 ISSUE 8.