As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF, F/A CALLED AND REPORTED SMOKE AND FUMES IN THE CABIN. RETURNED FOR LANDING. F/A THEN REPORTED ONLY FUMES. PRIOR TO LANDING FUMES HAD DISAPPEARED. FOUND DETERGENT SMELL NR 2 ENGINE. PERFORMED ENGINE RUN FOR 20 MINUTES. NO FUMES NOTICED.