As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AMATEUR-BUILT AIRCRAFT. DURING FLIGHT, ENGINE PROPELLER FAILED. AN OFF-AIRPORT LANDING WAS MADE. AIRCRAFT SUSTAINED DAMAGE TO LANDING GEAR. INVESTIGATION DETERMINED THAT ONE ENGINE AIR CLEANER ASSY WAS MISSING, BELIEVED TO HAVE STRUCK THE PROPELLER. FILTER IS A K & N MODEL AIR CLEANER. NO PART NUMBER AVAILABLE. NOT KNOWN WHEN AIR CLEANERS LAST MAINTAINED.