As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1708, DCA TO DFW - ON DESCENT INTO DFW A STRONG SMELL OF SMOKE FILLED THE AFT CABIN FROM ROW 13 BACK. MAINTENANCE INSPECTED A/C AND FOUND IN SAFE CONDITION TO MAINTENANCE FERRY TO PIT. PERFORMED OPERATIONAL CHECK OF CABIN AIR CONDITIONING OFF ENGINE BLEEDS AND CHECKS OF PACKS 1 AND 2. NO SMOKE SMELL PRESENT. A/C RETURNED TO SERVICE.