As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB TEMP. UNCONTROLLABLE, DUCT SUPPLY 40 DEGREE C LEFT PACK TEMP 50 DEGREE C. GROUNDED - YES. REMOVED AND REPLACED TEMP CONTROL VALVE ON LH PACK AS REQUIRED LEAK CKD GOOD NO LEAKS OPS CKD GOOD. REF AMM 21-51-10-400-801 PERFORMED TEMP CONTROLLER BITE TEST NO FAULTS FOUND REF AMM 21-61-00 RAN LH PACK CONT CABIN FROM COLD TO WARM TO HOT OPS CKD GOOD THROUGH ALL TEMPS.