As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MASTER CAUTION RECALL AMBER CONTROL CABIN AND FWD CABIN ZONE TEMP AND RIGHT PACK AMBER LIGHT ILLUMINATED. ALL THREE AMBER LIGHTS EXTINGUISHED DURING MASTER CAUTION SYSTEM RESET. ACFT GROUNDED. REMOVED AND REPLACED THE NR 2 PACK/ZONE TEMP CONTROLLER. OPS CHECKED GOOD IAW AMM 21-61-20.