What was found
AT 200€™ ON CLIMB OUT RECEIVED SMOKE AFT LAV WARNING MESSAGE, FOLLOWED BY AFT FLIGHT ATTENDANT EMERGENCY CALL CONFIRMING LIGHT SMOKE FROM THE LAV. RETURNED TO FIELD WHILE COMPLYING WITH QRH PROCEDURE OF OPENING APPLICABLE CIRCUIT BREAKERS. UPON LANDING FLIGHT ATTENDANTS CONFIRMED SMOKE HAD DISSIPATED. (FLIGHT 3228 - FILED CLOSED) THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 22765896 WITH THE FOLLOWING CORRECTIVE ACTION: "RAN LT AND RT ENGINES WITH THEIR OWN BLEED SOURCE INDEPENDENTLY OF EACH OTHER. CONFIRMED SMOKE SOURCE AS RT ENGINE BLEED ONLY. WHEN AIR CONDITIONING PACKS RAN FROM ANY OTHER BLEED SOURCE THAN RT ENGINE, NO SMOKE OR SMELL DETECTED. SEE CHILD DISCREPANCIES FOR FURTHER ACTION."