As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRACKS UNDER THE CARBURETOR HEAT SHROUD CAUSED RECIRCULATION OF EXHAUST GASSES AROUND THE CARBURETOR HEAT VALVE, THEREBY, CAUSING A PARTIAL POWER LOSS. SUBMITTER STATED ROUTINE INSPECTION OF THIS AREA WILL REVEAL HEAT WARPAGE PRIOR TO FAILURE.