What was found
ETOPS SIGNIFICANT SYSTEM - COCKPIT TEMPERATURE TRIM AIR VALVE, TEMPERATURE UNCONTROLLABLE, TRIM AIR TEMP GOES FROM 42C TO 124C WITH COCKPIT CONTROLLER SET ON INDEX MAKE. RESET THE C/B OF ZONE CONTROLLER AND PERFORMED THE SYSTEM TEST OF COCKPIT AND CABIN TEMP CONTROL AND THEN TEST PASSED IAW AMM 21-63-00-730-801-A. ACFT OK FOR SVC.