As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING AT AIRPORT THE CREW REPORTED THAT AFT CABIN FILLED WITH SMOKE. UPON TROUBLESHOOTING BY MX WITH THE LT ENGINE RUNNING AND LT BLEED HEAT ON THE CABIN DID FILL UP WITH SMOKE. FOUND THE LT COOLING TURBINE SEIZED - REPLACED LT COOLING TURBINE AND RUN COMPLETED SERVICEABLE. ACFT RELEASED TO SERVICE.