What was found
RECEIVED SMOKE AFT LAVATORY WARNING LIGHT AFTER TAKEOFF. FA REPORTED SMELLING UNUSUAL ODOR. LIGHT WENT OUT. RETURNED TO FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. LANDING WAS ESTIMATED AT 69,500 LBS WITH A DESCENT RATE OF 100-200 FPM. DRIED INTERNAL ENG AIRFLOW COMPONENTS IAW ENGINE CLEANING PERFORMANCE RECOVERY AMM TASK 72-00-00-100-801 PAR 4H, NO ODORS DETECTED, NO SMOKE WARNING LIGHT NOTED. NO MX ACTION REQUIRED FOR LANDING IAW AMM TASK FOR OVERWEIGHT LANDING 05-51-01-210-801. RETURNED TO SERVICE. NO PARTS REPLACED.