As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#149, JFK-GND. "STRONG MAGIC MARKER SMELL DESCENDING THROUGH 14800 SMELL DISAPATED AFTER 2 MIN SMELL NOTICEABLE IN COCKPIT AND AFT GALLEY; COMPLIED WITH INFO NOTICE 2017-T015 SECTION A ISOLATED FAULT TO TYPE 10 TRANSIENT ODOR WAS EXPERIENCE FOR A SHORT TIME ON DESCENT NO FURTHER ODOR WAS PRESERVED AFTER SHORT DURATION OF EVENT ITSELF AWD OPERATION ON GND PER TSM 05-50-00-810-085 TSM 05-50-00-810"