As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE HOSE CLAMP WAS THE 'SPRING RATCHET' TYPE INSTALLED BY CESSNA. THIS CLAMP CAME LOOSE IN-FLIGHT AND CAUSED CARBURETOR HEAT DUCT TO BECOME DIS-ENGAGED FROM THE HEAT MUFF. THE PILOT WAS UNABLE TO GET RID OF CARBURETOR ICE WHICH CAUSED THE ENGINE TO QUIT.