What was found
DESCENDING FROM 4,000, FUMES SMELLED IN COCKPIT, FWD + AFT CABIN-ACCOMP TSM 05-30-00-810-831 FOR CABIN IN ODOR ISOLATED PACKS, NO SIGN OF CONTAMINATION RAN BOTH ENGINES BLEED ALSO ISOLATED. NO SIGNS OF CONTAMINATION. INSPECTED PACKS TAPU AREAD. NO SIGN OF POSIBLE CAUSE. PERFORMED DECONAMINATION OF ECS IAW AMM 21-00-00. NO SMELL NOTED R+R RECTRAC FILTERS IAW AMM 21-21-41.