As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP LIGHT ILLUMINATED ON RECALL, EXTINGUISHED ON RECALL. ACFT GROUNDED. CONTROL CABIN TRIM MODULATING VALVE FAILED A BITE TEST. REMOVED AND REPLACED CONTROL CABIN TRIM MODULATING VALVE IAW AMM 21-61-21-000-801, AND 21-61-21-400-801. GROUND FUNCTIONAL TESTED GOOD IAW AMM 21-61-21-00-700-806-002.