What was found
WHILE PERFORMING HARTZELL PROPELLER SERVICE LETTER HC-SL-61-239, AND RAYTHEON MANDATORY SERVICE BULLETIN 61-3706 PART"B", SCORING WAS FOUND ON ALL PROPELLER SPLIT MOUNTING PLATES, DUE TO NO MOUNTING WASHERS INSTALLED. THE PLATES WERE REPLACED WITH NEW ONES, P/N 3E1951, AND THE PROPER WASHERS WERE INSTALLED, P/N A1381. INSPECTION OF THE PROPELLER HUB AND MOUNT STUDS HAD NEGATIVE DEFECTS.