As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH 2770 PHL - BNA - CREW REPORTED SMOKE IN THE CABIN AREA AND THE LEFT PACK OVERHEATED AND DIVERTED TO IAD. MAINTENANCE FOUND THE LEFT HAND PACK FAIL. DEFERRED THE LEFT PACK AND CLEARED SMOKE FROM THE CABIN. 12/7/04 MAINTENANCE REPLACED DUCT TEMP SENSOR.