What was found
FWD CABIN TEMP EICAS MESSAGE. FWD CABIN TEMP CONTROLLER INOPERABLE LIGHT ON, IAW MEL 21-61-01-02 CAT C DUE 25DEC20. TRANSFERRED TO MDDR 139550 PLACED ON MEL. PLACARDS INSTALLED. 15DEC20-LG PG 1188066-ITEM 3-PDX-PERFORMED ZONE TEMP CONTROLLER BITE, IAW FIM 21-61 FT 803. CONTROLLER FAULT FOUND, PER MCC REQUEST R & R ZONE TEMP CONTROLLER, IAW AMM 21-61-03. OPERATIONS TEST GOOD, MCC NOTIFIED. PLACARDS REMOVED, THIS CLEARS DMI 139550.