As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 0881 - DURING CLIMB, BOTH PACKS FAILED. THE RIGHT PACK RETURNED FOR 15 SECONDS THEN FAILED AGAIN. CREW RETURNED CLT. MAINTENANCE FOUND THE LEFT TEMPERATURE CONTROL VALVE STUCK OPEN CAUSING THERMOL TRIP ON LEFT PACK. THE LEFT PACK TEMPERATURE CONTROL VALVE WAS REPLACED. OPERATIONS CHECKED NORMAL. (W)