As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL340 FIRE BELL SOUNDED LOWER CARGO LIGHT ILLUMINATED AND AFT CARGO ON MX DISPLAY LIGHT EXTINGUISHED DESENDING THROUGH APPROX 16,000 FT. INSPECTED AND CLEANED LOWER AFT CARGO SMOKE DETECTORS OF DEBRIS, SYSTEM OP'S CHECKS NORMAL IAW HOLLINGSHEAD / SECURAPLANE AMM SUPPLEMENT 25-15-00-7. NO HARD FAILURE OF DETECTOR TO IDENTIFY WHICH CAUSED THE DEFECT.