What was found
WHEN LEFT PACK WAS TURNED ON AFTER A FEW SECONDS WE'VE GOT SMOKE IN THE CABIN AND 'L PACK AUTOFAIL CAUTION MSG WAS POSTED'. HAD PAX ALREADY ON BOARD AND DEPLANED IMMEDIATELY. DEFERRED PER MEL PERFORMED FIM TASK 21-21-00 AND 21-22-00. SMOKE AND ABNORMAL SMELL IN THE COCKPIT AND SMOKE SMELL ABNORMAL SMELL IN THE CABIN. CONFIRMED NR 1 DUCT TEMP UNCONTROLLABLE WHEN PACK NR 1 SELECTED. FOUND NR 1 ACM SIEZED. REMOVED AND REPLACED LT ACM IAW AMM 21-51-08. OPC GOOD.