As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE COURSE OF AN ANNUAL INSPECTION, CARBURETOR HEAT BOX FOUND CRACKED ON BOX AREA 5 INCHES LONG AND AROUND THROAT AREA RADIUS CRACKED 2 INCHES LONG. CARBURETOR HEAT BOX MOUNTS UP TO HORIZONTAL CARBURETOR. TOTAL TIME SINCE NEW 399.99. MAY BE A VIBRATION PROBLEM OR HEAT BOX METAL MAY BE TOO THIN.