As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT AFT CARGO SMOKE DETECTION LIGHT WARNING. LOOP A AFT, LIGHT WAS ILLUMINATED. ONE TIME AND BOTH LOOPS ONE TIME. NR 1 ENGINE WAS SHUT DOWN AT THE TIME. IAW 26-1600-05 CARGO SMOKE DETECTOR TEST PASSED. DUE TO THE INTERMITTENT FAULT. REMOVED AND REPLACED CARGO SMOKE DETECTOR CONTROL UNIT 50WU3 IAW 26-16-12-04-0.