What was found
SMELL OF SMOKE IN CABIN. NO SMOKE VISIBLE. FLIGHT ATTENDANT SMELLED SMOKE IN THE CABIN. NO SMOKE WAS SEEN, SMELL WAS PUNGENT AND LOCATED JUST AFT OF 1ST CLASS. ACCOMPLISHED BITE CHECK OF THE TEMPERATURE CONTROL SYSTEM, CHECKED ALL FANS FOR OPERATION, CHECKED CABIN INTERCOMMUNICATION DATA SYSTEM FOR FAULTS, CHECKED ALL CABIN LIGHTS. NO FAULTS FOUND. CHECKED THE ENVIRONMENTAL CONTROL SYSTEM (ECS) FOR CONTAMINATION, NONE FOUND. ACCOMPLISHED STAGE 2 CLEANING OF ECS SYSTEM, NO FURTHER REPORTS OF CABIN ODORS.