As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED SMOKE IN AFT CABIN IMMEDIATELY AFTER TAKEOFF. FLIGHT RETURNED TO ATL AND LANDED WITHOUT INCIDENT. EMERGENCY EQUIPMENT WAS CALLED OUT AS A PRECAUTION. RAN BOTH ENGINES AT TAKEOFF AND CLIMB POWER SETTINGS FOR TWENTY MINUTES, NO PROBLEMS WERE FOUND. OPERATED BOTH AIR CONDITIONING PACKS WITH SAME RESULTS. AIRCRAFT RETURNED TO SERVICE.