What was found
ON CLIMB OUT THE LEFT PACK LIGHT ILLUMINATED. WE RAN THE QRH CHECKLIST BUT THE PACK WOULD NOT RESET. GROUNDED - YES. RELEASED PER MEL 21-1G LEFT PACK INOP. C/W LT PACK LIGHT ILLUM B737-900 FIM 21-53 TASK 801. NO FAULTS FOUND. EXAMINED ACM NO DEFECTS NOTED. C/W PACK / ZONE TEMP CONTROLLER BITE TEST REF AMM 21-61-00. SRADA EXIT FAULT SHOWS ON LT PACK. REMOVED AND REPLACED LT RAM AIR EXHAUST ACTUATOR, OPS NML REF AMM 21-51-27-400-801. ACCOMPLISHED FIM 21-53 TASK 801, PACK FLOW CONTROL AND SHUTOFF VALVE CHECK, OPS NML PER SAME. THIS CLEARS MEL 21-1G.