What was found
FLT 948, LAS-JFK. DURING DESCENT, STRONG FUME ODOR THROUGHOUT CABIN AND FLIGHTDECK; C/W INFORMATION NOTICE 2017-T015, STEP 1 AND TSM 05-50-00-810-831-A. OPERATED APU AND ENG #1 + ENG # 2 WITH BOTH PACKS OPERATING. UNABLE TO DUPLICATE REPORTED ODOR. NO ABNORMAL ODOR NOTED IN FLIGHT DECK OR CABIN. A/C IS OK FOR CONT SVC.