As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A MX GROUND RUN OF THE ACFT, IT WAS NOTED THAT THE CABIN & COCKPIT HEAT WAS UNCONTROLLABLE. TROUBLESHOOTING OF THE SYS WAS CARRIED OUT, AND THE COOLING TURBINE WAS FOUND TO BE SEIZED. THE COOLING TURBINE WAS REPLACED WITH AN O/H UNIT AND THE SYS FUNCTION CHECKED SERVICEABLE. (TC 20100211007)