What was found
COCKPIT ODOR DURING DECENT LEVELING AT 5000'. ODORS DETECTED IN COCKPIT. DISAPPEARED AS SOON AS PACK 1 WAS SHUT OFF. ISOLATED TO PACK 1 LOCKED OUT DUE TO FUME EVENT. REACTIVATED PACK 1 IN ORDER TO FACILITATE OTHER MX IAW AMM 21-51-51. OPS CHECK GOOD. PERFORMED THOROUGH INSPECTION OF BLEED AIR. NO EVIDENCE OF OIL CONTAMINATION FOUND. RAN ENGINES IAW AMM 71-00-00. NO SMELL NOTED. PERFORMED DECONTAMINATION OF ENVIRONMENTAL CONTROL SYSTEM IAW AMM 21-00-00. NO SMELL NOTED.