As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD DUE TO ENGINE BLEEDS CAUSING HOT AIR TO ENTER THE AIRCRAFT REGARDLESS OF ENVIROMENTAL SETTINGS. MAINTENANCE REMOVED AND REPLACED THE TEMPERATURE TRIM VALVE. SYSTEM OPERATIONAL CHECK AND LEAK CHECK GOOD. AIRCRAFT RETUNED TO SERVICE.