As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO CONTROL TEMPERATURE IN ANY PART OF ACFT USING AUTO, TRIM AIR OFF, OR STANDBY SYSTEM. AFTER EXTENSIVE TROUBLE SHOOTING FOUND FAULTY COOLING CARD. REPLACED EQUIPMENT COOLING CARD M867 RAN ENGINES OP CHECKED GOOD. AC OK FOR SERVICE.