As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A TURNBACK FOR AN OIL TEMP PROBLEM ON THE LT ENGINE, THE CARGO SMOKE LIGHT ILLUMINATED INTERMITTENTLY. NO SMOKE WAS DETECTED OR NOTICED. AN EMERGENCY WAS DECLARED. MX REPLACED CARGO ZONE B1 AND C2 SMOKE DETECTORS AND RELEASED. AFCF PERFORMED AND SEVERAL FLIGHTS SINCE WITH NO DEFECTS NOTED.