As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CRUISING AT 5000 FEET THE PILOT REPORTED SEVERE VIBRATION. AFTER PERFORMING AN UNEVENTFUL LANDING AND ENGINE SHUT DOWN, THE PILOT OBSERVED THAT APPROXIMATELY 4 INCH INCHES OF ONE BLADE TIP WAS MISSING. FURTHER INVESTIGATION REVEALED THAT A SMALL STONE HAD LEFT A SMALL NICK IN THE LEADING EDGE OF THE PROPELLER BLADE WHICH IS WHERE THE TIP SEPPARATED FROM THE REST OF THE BLADE.