As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AND RIGHT ENGINE FIRE ANNUNCIATIONS ON INITIAL CLIMB. BOTH ANNUNCIATORS EXTINGUISHED WITHIN 4 SECONDS. EMERGENCY DECLARED AND DIVERTED TO KFRG. LANDING UNEVENTFUL. UPON SHUTDOWN NO EVIDENCE OF FIRE WAS PRESENT. MAINTENANCE REPLACED THE ENGINE FIRE MONITOR PCB. A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.