As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT DECK TEMP ISSUE, FLIGHT DIVERTED. TEMP DROPPED TO 52 DEGREES. TRIM AIR OFF-PACK STANDBY, NO HELP. REPLACED LT PACK TEMP CONTROL VALVE. AFTER RUNNING BOTH LEFT & RIGHT PACK WITH TRIM AIR OFF TEMP IN ALL ZONES STABILIZED AND WAS CONTROLLABLE. INSPECTED BOTH PACK BAYS FOR LEAKS NON DETECTED. NO OTHER DEFECTS NOTED.