As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRG AFT SMOKE WARNING MESSAGE IN FLIGHT. THEN WENT OUT QUICKLY BEFORE BEING ABLE TO RUN THE QRH PROCEDURE. COMPLIED WITH QRH PROCEDURE. (FLIGHT 3854) THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 23181797 WITH THE FOLLOWING CORRECTIVE ACTION: SEE CP 23181793 FOR TROUBLESHOOTING AND CORRECTIVE ACTION OF CARGO FIRE SYSTEM DUE TO REPEAT DISCREPENCIES.