As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARBURETOR PUMP DISCHARGE TUBE ASSY CAME ADRIFT INGESTING IN ENGINE, KNOCKING LOOSE THE SOLID COMBUSTION PARTICLES IN THE COMBUSTION CHAMBER WHICH FOULED A NUMBER OF THE SPARK PLUGS SIMULTANEOUSLY LOSING 50 PERCENT OR MORE OF THE POWER. BEING NEXT TO THE AIRSTRIP, SAFE LANDING WAS MADE.