What was found
ON A FLIGHT FROM ANC TO DUT, AT THE START OF THE DESCENT INTO DUT PILOT REDUCED POWER TO 60 PERCENT, AT WHICH TIME THEY HEARD A LOUD BOOM AND THE AIRCRAFT YAWED TO THE RIGHT. PILOTS NOTICED NR 2 ENGINE AT 20 PERCENT TORQUE AND TEMP RISING RAPIDLY, AFTER APPROX 3 SECONDS THE ENGINE RECOVERED AND BEGAN TO OPERATE NORMALLY. FLIGHT CREW ELECTED TO ABORT DESCENT AND DIVERTED TO CDB, ENGINE CONTINUED TO RUN PROPERLY. NO IMMEDIATE CAUSE WAS KNOWN FOR THE MALFUNCTION.