As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GROUND WITH APU RUNNING ENGINES SHUTDOWN L ENG FIRE CAS MASTER WARNING AND L FIRE LIGHT ILLUMINATED FOR 1 MINUTE THEN EXTINGUISHED CYCLE REPEATS EVERY MINUTE NO EVIDENCE OF FIRE NOTED. LT ENGINE FIRE NOW ON CONTINUOUS, RESISTANCE CH OF FIRE LOOPS CHK GOOD. REPLACED CONTROL MODULE IAW MM 26-10-02 FIRE WARNING CHECKED NORMAL.