What was found
FUME EVENT DECENDING THROUGH 5000FEET TURNED PACK 1 OFF SMELL WENT AWAY. SMELL RESEMBLED A CHEMICAL SMELL-PER TSM 05-50-00-810-831-A FOR CAUSE OF CABIN/COCKPIT ODORS OR SMOKE. RAN APU, PACKS, ENGINES WITH NO EVIDENCE OF LEAKS OF ODORS AT THIS TIME A/C OK FOR SERVICE