As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1498, DEN-JFK. 'UNIDENTIFIED ODOR FROM VENTILATION SYSTEM ON DESCENT FROM 5000 TO 2000 FEET FUME/ODOR STRENGTH 6/10; PERFORMED DETAIL VISUAL INSPECTION OF PACK #1 AND #2 IAW AMM 21-00-00. NO EVIDENCE OF LEAKS FOUND. NO OIL FOUND. COMPLIED WITH INFO NOTICE 2017-T015 SECTION B2 . DECONTAMINATION LEVEL A WAS ACCOMPLISHED PER TSM 05-50-00-810-831-A. AIRCRAFT IS OK FOR SVC.'