As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DECK AND LWR AFT CARGO FIRE LIGHT ILLUMINATED DURING COCKPIT SETUP. MX WAS CALLED AND SYSTEM CHECKED OK. BOTH LIGHTS AGAIN ILLUMINATED AFTER CLOSING THE ENTRY DOORS PRIOR TO PUSH. REMOVED AND REPLACED CARGO SMOKE DETECTION CONTROLLER P/N 905701-04, S/N 0201, AS A PRECAUTION, PER AMM ATA 26-16-12-4. OK FOR SERVICE.