As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT TOOKOFF, DURING CRUISE FLIGHT, SEVERE VIBRATION OCCURRED FROM ENGINE. ENGINE PULLS BACK TO IDLE AND EMERGENCY LANDING MADE ON ROAD . UPON INSPECTION IT WAS DISCOVERED THERE WAS 7.5 INCHES OF BLADE TIP MISSING. SERIAL NR OF BLADE IS NOT ACCESSIBLE AT THIS TIME, MUST DISASSEMBLE PROP. BLADE SN IS EITHER K46513YS OR K64839S ACCORDING TO PROP LOG. (K)