As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CUSTOMER COMPLAINED OF HOT AIR EXITING BAGGAGE COMPARTMENT WHEN UNLOADING BAGGAGE IN COLD WEATHER. UPON REMOVING CENTER OVERHEAD BAGGAGE SHROUD, FOUND C-4 HEATER DUCT ELBOW P/N BWT13671-1 RUPTURED ALLOWING HOT AIR FROM HEATER TO ENTER BAGGAGE COMPARTMENT. REPLACED ELBOW WITH NEW PART. FORWARDED OLD PART TO MANUFACTURER FOR EVALUATION.