What was found
SMOKE OBSERVED IN COCKPIT DURING FLIGHT. C/A-REMOVED AND REPLACED DUCT TEMP SENSOR NR 1 AND NR 2 O-RING IAW AMM 21-60-03. NO DEFECTS NOTED. DURING INSPECTION DETERMINED ACM BEARING FAILURE. RERENCE AMM 21-51-03. AS PER MOC MOD, ETN FOR SMOKE EVENT NOT NEEDED DUE TO ACM NR 1 DAMAGE BEING CAUSE OF ODOR EVENT. REMOVED AND REPLACED PACK 1 ACM IAW AMM 21-51-03. PREFORMED OPERATIONAL TEST OF PACK SYSTEM IAW AMM 21-51-00, NO DEFECTS NOTED, OPC GOOD. SERVICED OXYGEN IAW AMM 12-14-00. NO LEAKS NOTED. AIRCRAFT OK FOR SERVICE.