As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN ZONE TEMP LIGHT CAME ON WITH RECALL. ACFT GROUNDED. R & R AFT CABIN ZONE TEMP TRIM AIR MODULATING VALVE. RAN RT PACK LEAK CHECKED GOOD. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE TEST NO FAULTS FOUND. ALL WORK DONE IAW AMM 21-61-00-700-806-002 AND 21-61-21-000-801.