What was found
DURING CRUISE FLIGHT @FL340 RIGHT PACK LIGHT ILLUMINATED. ACCOMPLISHED PACK LIGHT QRH AND RIGHT PACK LIGHT EXTINGUISHED WITH HIGHER TEMP SELECTED & TRIP RESET (THE RIGHT PACK LIGHT DIDN'T EXTINGUISH WHEN MASTER CAUTION SYSTEM WAS PRESSED TO RESET INITIALLY). GROUNDED - YES. ACCOMPLISHED BITE CHECK OF #2 TEMP CONTROLLER AND HAD SRADA EXIT FAULT LIGHT ILLUMINATED PER B737-900 AMM 21-61-00. REMOVED AND REPLACED RH RAM AIR EXHAUST ACTUATOR. INSTALLATION TEST OK. REF AMM 21-51-27. ACCOMPLISHED BOTH PACK/ZONE TEMP CONTROLLER BITE WITH NO FAULTS REF AMM 21-61-00. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.