As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARPET EDGE CAME INTO CONTACT WITH WING HEAT DUCT. WING HEAT WAS USED LONGER THAN NORMAL DUE TO WEATHER CONDITIONS. THE CARPET EDGE WAS HEATED UNTIL IT STARTED SMOKING. THE AIRCRAFT DIVERTED FOR PRECAUTION. THE CARPET WAS TRIMMED BACK AND ADDITIONAL INSULATION WAS INSTALLED TO PREVENT RECURRENCE. (X)