As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GET AFT CABIN ZONE TEMP LIGHT ON RECALL GOES OUT ON RESET. ACFT GROUNDED. TRIM ZONE SHOWS TRIM VALVE ZONES ON ALL 3 BITE TEST WILL NOT RESET. REMOVED AFT TEMP ZONE VALVE REF TASK 21-61-000-801. INSTALLED ZONE TEMP MODULATING VALVE REF TASK 21-61-21-400-801. OPS TEST LEAK CHECKD GOOD. PERFORMED BITE TEST REF TASK 21-61-00-700-806-002. NO DEFECTS NOTED ON RECALL ON MASTER CAUTION.