As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON MASTER CAUTION RECALL, THE LEFT PACK LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURES AND THE LEFT PACK LIGHT EXTINGUISHED ON MASTER CAUTION RESET. ACFT GROUNDED. CONFIRMED FAULT. LT PACK/ZONE TEMP CONTROLLER BITE SHOWS HARD TCV 1 (V139) FAILURE. NO FAULTS LOGGED ON RT CONTROLLER. GVI TCV 1, FOUND THE VALVE STUCK & WILL NOT TURN. REMOVED & REPLACED TCV 1 (V139) IAW AMM 21-51-10. LEAK CHECKED & GROUND FUNCTIONAL CHECKED NORMAL IAW AMM 21-61-00-700-806-002.