What was found
MUFFLER CRACKED INTERNALLY ALLOWING EXHAUST GASES TO ENTER HEATING SHROUD, THEREBY ALLOWING FUMES INTO CABIN.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MUFFLER CRACKED INTERNALLY ALLOWING EXHAUST GASES TO ENTER HEATING SHROUD, THEREBY ALLOWING FUMES INTO CABIN.