As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PROP WAS REMOVED DURING ENGINE REPAIRS, NUT HOLDING PROP TO CRANKSHAFT WAS FOUND CRACKED. NUT WAS CRACKED FROM NOTCH FOR INSTALL/REMOVAL TOOL TO HOLE FOR LOCKING CLIP. NUT WAS REPLACED WITH OVERHAULED UNIT AND PROP WAS REINSTALED & AIRCRAFT RETURNED TO SERVICE.