As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO FIELD DUE TO THE COCKPIT TEMP WAS UNCONTROLLABLE, OUTPUT REACHED 118 DEGREES AND COCKPIT TEMP REACHED 94 DEGREES. TURNED OFF THE NR 2 PACK. THE TEMPS CONTINUED TO CLIMB. TROUBLESHOT AND FOUND LOW REGULATING PRESSURE IN THE NR 1 PACK, R & R THE FLOW CONTROL VALVE. FOUND A MISSING ACM LINE BLANKING PLUG, R & R THE PLUG. FOUND A CRACKED CONDENSOR, R & R THE CONDENSOR. PERFORMED A LEAK CHECK AND NO LEAKS NOTED. PERFORMED CFDS ZONE TEMP CONTROL TEST AND FUNCTIONAL TEST OF COCKPIT TEMPERATURE AND NO FAULTS FOUND.