As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL SELECTION GOT BOTH MASTER CAUTION LIGHTS, AIR COND LIGHT, AND LEFT PACK LIGHT. PERFORMED QRH CHECKLIST, SELECTED MASTER CAUTION RESET AND LIGHT WENT OUT. ACFT GROUNDED. ACCOMPLISHED LEFT PACK ZONE TEMP CONTROLLER BITE CHECK. ALL PREVIOUS 9 FLIGHT LEGS LOGGED TEMP CONTROL VALVE FOR LT PACK. REPLACED LT TCV REF MM21-51-10. OPS AND LEAK CHECKS GOOD. PACK/ZONE TEMP CONTROLLER BITE SHOWS NO FAULTS.