As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED ON APPROACH THE LEFT FIRE CAS MESSAGE APPEARED, THERE WERE NO OTHER FIRE INDICATIONS AND UPON LANDING THE MESSAGE EXTINGUISHED. MAINTENANCE INSPECTED AND SUSPECTED DAMAGE AT THE FIRE DETECTOR POSITION 1, REPLACED THE FIRE DETECTOR WITH NO OTHER DEFECTS NOTED.