As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - FLT 825 - EN ROUTE STL-LAX - IMMEDIATELY AFTER TAKEOFF CABIN FILLED WITH SMOKE. FLIGHT ATTENDANTS REPORTED AN ELECTRICAL SMELL. RETURNED STL AND LANDED WITHOUT INCIDENT. REPLACED RIGHT SIDE RECIRCULATION FAN. ACCOMPLISHED PACK BURNOUT PER MM. NO SMELL OR ODOR NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)