As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN AFT ZONE TEMP MSG(<P>TRANSFERRED TO MDDR 125575 IAW DDG 21-61-04-02, CAT 'C', DUE 19MAR20. VERIFIED AFT ZONE TRIM VALVE CLOSED. DISCONNECTED AND STOWED. </P><P>LP 822586: PERFORMED OPS CHECK OF AFT CABIN ZONE TEMP SYSTEM IAW FIM 26-61 FAULT TREE. OPS CHECKED GOOD. NO FAULTS NOTED. THIS CLEARS MDDR 125575. PLACARDS REMOVED.</P>)