What was found
F/A REPORTED POSSIBLE FUMES ON APPROACH. ACCOMPLISHED TSM 05-50-00-810-831 FOR CABIN ODOR. RAN BOTH PACKS ON APU BLEED. ISOLATED PACKS , NO SIGN OF CONTAMINATION. RAN BOTH ENGINES BLEEDS, ISOLATED PACKS. NO SIGNS OF CONTAMINATION. INSPECTED PACKS AND APU AREAS. NO SIGN OF POSSIBLE CAUSES. AS A PRECAUTION, PERFORMED DECONTAMINATION OF THE ENVIROMENTAL CONTROL SYS IAW AMM 21-00-00. NO ODORS NOTED. ACFT OK FOR SERVICE.