What was found
FLIGHT ATTENDANT REPORTED SMOKE IN CABIN, NO SMELL. TURNED PACK 1 OFF, SMOKE DISAPPEARED. FOUND SMOKE TO BE AIR CONDITION CONDENSATION, CAUSE OF LOOSE DUCT FROM PACK TO RECIRC FAN. R & R DUCT TO NR 1 RECIRC FAN IAW AMM 21-20-04. PERFORMED AIR CONDITION OPERATIONS CHECK, FOUND WORKING GOOD NO SMOKE NOTED AT THIS TIME IAW 21-51-00.