As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STS FLIGHT NR 2467: 'CHECK FIRE DETECT' MASTER WARNING LIGHT ILLUMINATED AFTER BOTH ENGINE START WITH NO OTHER INDICATIONS NOTED. MAINTENANCE CYCLED POWER TO THE FIRE DETECT SYSTEM. PERFORMED FIRE DETECT SYSTEM TEST. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.