What was found
THE SIC NOTICED THE ENGINE INSTRUMENT INDICATIONS WERE DISPLAYING IRREGULAR INDICATIONS WHILE OVER A LAKE FILLING A WATER BUCKET. NR 2 ENGINE ROLLED BACK TO IDLE AND WOULD NOT ACCELERATE. TRANSMISSION INDICATIONS WERE NORMAL APART FROM A TORQUE SPLIT. NOSED ACFT OVER AND ESTABLISHED SINGLE ENGINE FLIGHT TO THE NEAREST AIRPORT AND EXECUTED A RUN ON LANDING. AFTER SHUTDOWN MAINTENANCE INSPECTED NR 2 ENGINE AND FOUND COMPRESSOR DAMAGE. UPON FURTHER INSPECTION OF THE AREA IT WAS DISCOVERED A NUT WAS MISSING FROM THE NR 2 ENGINE INLET SCREEN. MISSING NUT WAS REPLACED WITH NEW HARDWARE AT THE INLET SCREEN. NR 2 ENGINE WAS R & R WITH SERVICEABLE ENGINE. AIRCRAFT WAS RETURNED TO SERVICE ON 8/30/2016 AFTER ENGINE RUNS AND CHECK FLIGHT. NO FURTHER DEFECTS NOTED.