As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON M/RECALL CK CONTROLLER CABIN ZONE TEMP LIGHT CAME ON. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE, BITE SHOWS PRIMARY COCKPIT TRIM VALVE FAULT. TEST AND RESET NORMAL WITH NO CURRENT FAULTS. ZONE TEMP DOES NOT ILLUMINATED WITH RECALL. REF AMM 21-61-00-700-806-002.