As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK LIGHT ILLUMINATED ON RECALL. EXTINGUISHED WHEN RESET. PRIOR TO PACK LIGHT ILLUMINATION, VERY WARM AIR THROUGHOUT CABIN, TEMP STABILIZED AFTER PACK LIGHT ILLUMINATED (DUE TO AUTOMATIC SWITCH TO SECONDARY CONTROLLER). GROUNDED-YES. REMOVED AND REPLACED RT TEMPERATURE CONTROL VALVE, IAW B737-800 AMM 21-51-10/401, WAS CHANGED EARLIER THIS MONTH BUT SUSPECT BAD PART OUT OF STOCK. ETOPS GROUND FUNCTIONAL CHECK GOOD, IAW AMM 21-61-00-700-806-002.