As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECAL THE ZONE TEMP LIGHT FOR THE CONTROLLER CABIN ILLUMINATED. PERFORMED QRH PROCEDURE AND LIGHT WENT OUT WITH MASTER CAUTION PUSH TO RESET. ACFT GROUNDED. REPLACED THE CONTROLLER CABIN TRIM AIR MODEL VALVE ASSY REF MM 21-61-21. OPS BITES CHECK GOOD, NO LEAKS FOUND.