As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INVESTIGATION FOR CAUSE OF POWER LOSS AND AUTOROTATION OF AIRCRAFT, DISCOVERED GASKET BETWEEN AIR FILTER HOUSING AND CARBURETOR INLET HAD ONE CORNER FOLDED OVER ALLOWING DIRT TO ENTER AND BLOCK CARBURETOR AIR PASSAGES. SUBMITTER SUSPECTS IMPROPER INSTALLATION WHEN CARBURETOR WAS INSTALLED 190.4 HOURS PREVIOUSLY.