What was found
AFTER TAKEOFF, THE NR 2 PACK VALVE CLOSED ON EICAS. RESET IAW QRH. CREW SMELLED SLIGHT BURNING SMELL. NO ODOR NOTED IAW ETN-EM-72-034. REMOVED AND REINSTALLED THE RT DUAL TEMPERATURE CONTROL VALVE, INSTALLED A NEW SLEEVE ON CONTROL VALVE IAW AMM 21-60-01, PERFORM AN OPERATIONAL TEST IAW AMM 21-51-00, OPS CHECKED GOOD, NO ABNORMAL ODOR NOTED.