As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
@ FL 340 AFT CABIN TEMP BECAME HOT. RIGHT PACK TEMP WAS PEGGED AT 100 DEGREES C. ON RECALL, HAD A RIGHT PACK LIGHT. RAN QRH FOR "PACK" & COULD NOT CORRECT. THEN RAN "CABIN TEMP HOT" IN QRH. CABIN COOLED THEN. ACFT GROUNDED. REMOVED AND REPLACED PACK TCV, REF B737-900 AMM 21-61-21. OPERATIONAL CHECK NORMAL. PERFORMED BITE TEST, IAW AMM 21-61-00-700-806-002, TESTED GOOD.