What was found
ON ROTATION RT ENG TORQUE WENT TO 4000 LBS. FOR APPROXIMATELY 2 SECONDS. ENG STARTED TO AUTOFEATHER & PILOT PULLED THROTTLE BACK & SHUTDOWN ENG. PERFORM A BORESCOPE INSPECTION OF ENGINE, NO DEFECTS NOTED. PERFORMED REMOVAL & INSPECTION OF OIL FILTER & HOUSING ASSY. NO DEFECTS NOTED. PERFORMED COMPRESSOR TURBINE WASH. PERFORMANCE & GROUND CHKS PERFORMED IAW MM, OPS CHK GOOD, NO LEAKS NOTED. REMOVED & INSPECTED RGB SCREEN FOR CONDITION & BLOCKAGE, NO DEFECTS NOTED. REMOVED & INSPECTED OIL FILTER & FILTER BOWL FOR EVIDENCE OF COKE/SLUDGE PER MM, NO DEFECTS NOTED. REMOVED & INSPECTED RGB CHIP DETECTOR IAW MANUAL, NO DEFECTS NOTED. INSPECTED FRICTION LOCK ON ENG & PROP CONTROLS, NO DEFECTS NOTED. VERIFIED MAX NP WITHIN LIMITS, NO DEFECTS NOTED. PERFORMED OVERSPEED GOVENOR OPS CHK, NO DEFECTS NOTED. INSPECTED FEATHER ACTUATION POINT ON PROP LEVER-OPS CHECK GOOD.