As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING SB WHICH INCLUDES PROPELLER, REMOVING THE MOUNTING PLATE FROM THE SLIP RING, FOUND THAT THE WASHERS USED TO HOLD THESE ITEMS TOGETHER ARE TOO WIDE AND SCORED, THE PROP HUB. WERE ABLE TO POLISH OUT THE SCOPE MARKS ON THE HUB AND MODIFY THE WASHERS TO HAVE A SLIGHT FLATEN AREA ON ONE SIDE AS NOT TO CONTACT THE HUB. (K)