What was found
RT TEMP PACK EICAS. ISSUED MDDR 134974, IAW DDG 21-51-03-01, CAT C, EXPIRES 05/OCT/20. NO MX ACTION REQUIRED. PLACARDS INSTALLED. PERFORMED BITE OF RT PACK TEMP CONTROLLER, IAW FIM 21-51 FT803. FAULTED RT PACK CONTROL VALVE. REMOVED AND REPLACED RT PACK TEMP CONTROL VALVE, IAW AMM 21-51-12. OPS CHECK GOOD, NO FAULTS NOTED. THIS CLEARS DMI 134974, MCC NOTIFIED. PLACARD REMOVED. DISPATCH- CW @ 1853Z.