As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL, LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. GROUNDED - YES. DURING BITE RH TEMP CONTROL VALVE FAULTED. REMOVED AND REPLACED RH TEMPERATURE CONTROL VALVE IAW B737-800 AMM 21-51-10-000-801 AND AMM 21-51-10-400-801, ETOPS GROUND VERIFICATION CHECK GOOD IAW AMM 21-61-00-700-806-002.