As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE THE FA SMELLED SMOKE IN THE CABIN. THE CREW FOLLOWED THE CHECKLIST. ODOR DISSIPATED. DECLARED AN EMERGENCY. THE AIRCRAFT LANDED WITHOUT INCIDENT. FIRE DEPT CHECKED OUT THE AIRCRAFT AND FOUND NO HOT SPOTS. MX RAN PACKS OFF EACH ENGINE AND THE APU. COULD NOT DUPLICATE ODOR.