What was found
RIGHT PACK LIGHT ILLUMINATED ON RECALL. LIGHT GOES OUT WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED FIM 21-53 TASK 810, PACK ZONE TEMP CONTROLLER BITE AMM 21-61-00-700-806-002 SHOWS THE RIGHT PACK EXHAUST FAULT. REMOVED AND REPLACED THE RAM AIR EXHAUST ACTUATOR IAW AMM TASK 21-51-27. TESTED ACTUATOR AND THE SYSTEM OPS AND INDICATIONS. THE AFT EXHAUST DUCT LOUVERS INTERMITTENT STAYED HALF CLOSED ON THE AIR MODE FOR A FEW SECONDS THEN STAYED OPEN. THE PROCESS REPEATED ITSELF TWO TIMES. SUSPECT A BAD ACTUATOR. OPS CHECKED THE RAM AIR INLET & EXHAUST ACTUATION. RAN OPS CHECK MULTIPLE TIMES. BOTH ACTUATORS ON THE NR 2 SIDE OPERATE NORMALLY. RAM FIM 21-53 TASK 810 INCLUDING BITE AMM 21-61-00-700-806-802. NO FAULTS FOUND.