As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CARGO FIRE TEST, DETECTOR FAULT LIGHT ILLUMINATED AFT WARNING LIGHT DOSE NOT ILLUMINATE ON A LOOP. ACFT GROUNDED. TESTED FWD AND AFT DETECTORS ON A, B, NORM 10 TIMES. AFT LIGHT CAME ON EACH TIME. DETECTORS FAULT LIGHT DID NOT ILLUMINATE. PERFORMED GVI OF EACH AFT CARGO SMOKE DETECTORS, NO DEFECTS NOTED.