As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RIVETS ATTACHING THE WELD ASSY BUSHING PN 95-91912-95 TO THE RT ENGINE CARBURETOR AIR BOX ASSY PN 95-919114-19 WORKED LOOSE CAUSING THE BUTTERFLY IN THE CARBURETOR HEAT BOX TO BECOME LODGED IN THE CARBURETOR HEAT ON POSITION RESULTING IN A FUEL RICH CONDITION FOR THE ENGINE. WHEN THE CARBURETOR HEAT CONTROL WOULD NOT PUSH IN TO TURN HEAT OFF (BECAUSE OF STUCK BUTTERFLY), THE PILOT OPTED TO SHUT DOWN THE ENGINE.