As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SMOKE / FUMES SMELLED VIA LEFT PACK SYSTEM ON DESCENT INTO TYS. AIRCRAFT LANDED IN TYS WITHOUT INCIDENT. MAINTENANCE INSPECTED LEFT DUCTS, APU COMPARTMENT AND AVIONICS BAY AND RAN APU AND ENGINES. NO DEFECTS OR SMELL NOTED. ALL WORK ACCOMPLISHED BY MAINTENANCE USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.