As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATED ON RECALL ZONE LIGHT CLEARS WITH MASTER CAUTION RESET. GROUNDED - YES. CONTROL CABIN TRIM MODULATING VALVE FAULTED DURING BITE. REMOVED AND REPLACED CONTROL CABIN TRIM MODULATING VALVE IAW B737-800 AMM 21-61-21-000-801 AND AMM 21-61-21-400-801, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 21-61-00-700-806-002, CLEARS MEL 21-21G, CONTROL NUMBER 31018562 REMOVED, SEAMC DAVE NOTIFIED, NO AIRCRAFT CONFIGURATION CHANGE.