What was found
ECON COOL VALVE, RT PACK ECONOMY COOLING VALVE NOT IN COMMANDED POSITION. STATUS MSG01- LATCHED CRUISE MODE DEPENDENT DB-CABIN TEMP CONTROLLER (RT CHAN2) MSG02- LATCHED CRUISE MODE DEPENDENT; ECONOMY COOLING VALVE (RT PACK) IS NOT IN COMMANDED POSITION. MSG-2124902 LATCHED ER MODE, MSG-2124902 LATCHD ER MODE. FOUND MSG ACTIVE & DID TEST IAW FIM, THE RIGHT VALVE MOVED FROM CLOSED TO OPENED THEN CLOSED, BUT MSG SHOWED & TEST FAILED. ITEM DF'D IAW MEL, PLACARD INSTALLED. REPLACED RT ECONOMY COOLING VALVE IAW MM. ALSO REPLACED RELAY K21008 AND SEC HEAT EXCHANGER OUT TEMP SENSOR M21519.