As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, THE CREW REPORTED A FIRE INDICATION ON THE LEFT ENGINE. THE CREW FIRED BOTH ENGINE FIRE BOTTLES. UPON INVESTIGATION, MAINTENANCE FOUND NO EVIDENCE OF FIRE, BUT DID FIND A NICK ON THE LEFT ENGINE FORWARD FIRE LOOP. THE LOOP WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.