As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PACK NOT COOLING. FOUND LT PACK TEMPERATURE VALVE FAILED OPEN. RESET, NO HELP. DEFERRED LT PACK TEMPERATURE VALVE INOPERATIVE IAW MEL 2151S. COMPLIED WITH DEACTIVATION PROCEDURE. REPLACED LT PACK TEMPERATURE CONTROL VALVE IAW AMM, OPERATIONS CHECKED OK.