What was found
FLT # 1606 TPA- ISP. " UPON DESCENDING EXPRERIENCED A FUME EVENT THEN TURNED PACK 1 OFF - AFTER 10 MINUTES TURNED PACK 1 ON - FUMES SMELL CAME BACK ( PACKS ).; COMPLIED WITH INFORMATION NOTICE 2017-T015, STEP 1, ISOLATED FAULT TO TYPE 10, AMBIENT AIR DURING FLIGHT PHASE. PERFORMED LEVEL A DECONTAMINATION IAW 21-00-00-615-802 PER TSM 05-50-00-810-085-B. AIRCRAFT OK FOR SERVICE. MCC NOTIFIED, PLACARD REMOVED & MX-4 UPDATED."