As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE NR 1 MAIN DECK CARGO SMOKE DETECTOR LIGHT ILLUMINATED AND FIRE BELL ACTIVATED. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND VERIFIED NO CARGO SMOKE OR FIRE. AIRCRAFT CONTINUED TO DESTINATION AND LANDED WITHOUT INCIDENT. TIGHTENED COVER FOR MAIN DECK CARGO SMOKE DETECTOR AMPLIFIER AND CLEANED A8 SMOKE DETECTOR CARD. OPERATIONAL CHECK GOOD.