As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED ON WITH RECALL, EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. REMOVED & REPLACED THE NR 2 AFT ZONE TRIM MODULATION VALVE IAW AMM TASKS 21-61-21-000/400. OPS CHECKED GOOD IAW AMM TASK 21-61-00-700-806-002 PACK/ZONE TEMPERATURE CONTROL BITE TESTED NORMAL.