As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND CARBURETOR AIR BOX EXTENSIVELY CRACKED IN THROAT AREA. SUBMITTER STATED THIS IS A CONTINUAL PROBLEM. DESIGN APPEARS TO BE FAULTY. NEEDS ADDITIONAL SUPPORT FOR FATIGUE RESISTANCE. THE CRACKED UNIT ALLOWS UNFILTERED AIR INTO ENGINE.