As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CAB ZONE TEMP LIGHT ILLUMINATED ON RECALL ON ARRIVAL EXTINGUISHED WITH MASTER CAUTION. ACFT GROUNDED. ZONE TEMP BITE FAULTED CONTROL CABIN TRIM AIR MODULATING VALVE. REMOVED, REPLACED, AND TESTED V143 IAW MM 21-61-21-400-801, TEST PASSED. ETOPS SIGNIFICANT SYS GROUND VERIFICATION SUCCESSFUL.