As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARBURETOR HEAT FLAPPER VALVE MATERIAL FAILURE. A PIECE OF THE CARB HEAT FLAPPER VALVE MATERIAL SEPARATED FROM THE VALVE ASSEMBLY AND GOT STUCK IN THE THROTTLE BODY OF THE CARBURETOR, CAUSING SIGNIFICANT DEGRADATION OF THE ENGINE'S PERFORMANCE.