As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND CLIMB TO 8,500 FEET ALTITUDE, LEVELED OFF IN NORMAL CRUISE FLIGHT. I.A.S. 220 MPH. WTH NO PRIOR WARNING, SEVERE VIBRATION OCCURRED. SHUT DOWN ENGINE AND DECLARED EMERGENCY AND MADE A SUCCESSFUL FORCED LANDING. GROUND INSPECTION DISCLOSED THE WOODEN PROPELLER FAILED. ONE-THIRD OF ONE BLADE TRAILING EDGE PARTED IN-FLIGHT.