What was found
AIRCRAFT WAS GROUNDED: MODERATE DIRTY SOCKS SMELL-ODOR IN FLIGHT DECK AT LOW THRUST SETTING, GROUND AND AIR. CREW REPORTED THAT THE ODOR STARTED AFTER ENGINE START AND DISAPPEARED AFTER TAKE OFF, THEN RE-APPEARED DURING APROACH AND LANDING. THE ODR BECAME THE STRONGEST AFTER LANDING AND DURING TAXI IN. **ORIGINAL REPORT WAS AALA202210066902: MAINTENANCE DETERMINED THE LEFT-HAND ENVIRONMENTAL CONTROL SYSTEM WAS CONTAMINATED. MAINTENANCE ACCOMPLISHED A DECONTAMINATION OF THE LEFT ENVIRONMENTAL SYSTEM ALONG WITH REPLACING THE FLOW CONTROL VALVE, PACK CONDENSER (AALA202210079513), REHEATER (AALA202210074088) AND OZONE FILTER (AALA202210079534) PER TASK CARDS 26L00021004, 26L00021001, 26L00021013 AND 26L00021003. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.