As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS SMOKE WARNING FOR AFT CARGO PIT. NTERROGATED SYSTEM AND UNABLE TO VERIFY FAULT FOR AFT CARGO COMPARTMENT SMOKE DETECTION. REPLACED SDU PER AMM 26-17-34. REPLACED AFT CARGO COMPARTMENT SMOKE DETECTOR PER AMM 26-16-15. REPLACED AFT CARGO FIRE BOTTLE AND SQUIB AS REQUIRED.