As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100 HOUR INSPECTION, TECHNICIAN FOUND BOTH RIGHT AND LEFT ENGINE CARBUETOR HEAT AIRBOXES CRACKED. THE RIGHT AIRBOX WAS CRACKED AT THE HOT AIR INLET, LOCATED AT THE POINT WHERE TUBE IS WELDED TO AIRBOX AND EXTENDING HALFWAY AROUND THE TUBE. THE ALMOST ALL THE WAY AROUND THE TUBE, RESULTING IN ALMOST COMPLETE SEPARATION OF THE TUBE FROM THE AIRBOX. A POSSIBLE BOTH COLD AND HOT AIR TUBES.