What was found
CABIN TEMP STILL HARD TO CONTROL, HAD TO GO TRIM OFF. THEN OK. ZONE TEMP CNTR FAILED FORWARD TRIM VALVE. REPLACED VALVE, OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CABIN TEMP STILL HARD TO CONTROL, HAD TO GO TRIM OFF. THEN OK. ZONE TEMP CNTR FAILED FORWARD TRIM VALVE. REPLACED VALVE, OPS CHECK GOOD.