What was found
IN CLIMB-OUT, CREW NOTICED RIGHT NP BEGAN SHOWING OUT OF LIMITS. NP THEN BEGAN TO SURGE AND FLUCTUATE UP TO APPROXIMATELY 102 PERCENT. CREW FOLLOWED QRH PROCEDURES, WHICH REQUIRED FEATHERING RIGHT PROPELLER. CREW DECLARED EMERGENCY, DIVERTED TO AGS, AND LANDED SAFELY. MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE PCU IAW EMB120 MM 61-00-00. LEAK AND OPERATIONAL CHECKS WERE GOOD ON GROUND RUNS. AIRCRAFT RETURNED TO SERVICE. (M)