As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE, FLT APU FIRE WARNING MESSAGE APPEARED ON ED NR 1. QRH FOLLOWED, MESSAGE REMAINED FOLLOWED BY A RT EXAUST PIPE OVERHEATED WARNING MESSAGE. THEN LT ENGINE FIRE WARNING MESSAGE APPEARED ON EDI. QRH FOLLOWED, LEFT ENGINE SHUTDOWN AND AIRCRAFT DIVERTED TO TYS AND A SINGLE ENGINE LANDING. AIRCRAFT WAS EVACUATED.THE FIRE DETECTOR P/N 472597-01 WAS REPLACED.