As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ON RECALL, RESETS ON MASTER CAUTION RESET. PERFORMED BITE TEST ON LT PACK TASK 21-61-00. LT TEMP CONTROL VALVE FAILURE. REPLACED LT PACK TEMP CONTROL VALVE IAW MM 21-51-10-400-801. PERFORMED BITE TEST AGAIN BITE FOUND NO FAULTS.