As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP ILLUMINATED. QRC ACCOMPLISHED, ILLUMINATES ON RECALL. ACFT GROUNDED. PERFORMED PACK/ZONE BITE CHECK IAW AMM 21-61-00-700-806-002. FOUND A "FLT DECK DUCT SENSOR" FAULT. RETESTED AND RECEIVED THE SAME FAULT. REPLACED THE CONTROL CABIN DUCT LIMIT SENSOR IAW AMM 21-61-04-000-803-002. RETESTED AND NO FAULTS INDICATED.