As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DEPARING YYH FOR YCB NR 2 ENGINE FIRE WARNING OBSERVED. DRILL CARRIED OUT AIRCRAFT RETURNED TO POINT OF DEPARTURE LANDING WITH OUT INCIDENT. MAINTENANCE FOUND FIRE LOOP CONNECTOR OIL FOULED, NO EIDENCE OF FIRE, CONNECTOR CLEANED, SYSTEM CHECKED SERVICEABLE. BOTH NR 2 BOTTLES REPLACED AIRCRAFT RETURNED TO SERVICE.