As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CENTER MUFFLER HOUSING SPLIT OPEN AT THE UPPER WELD SEAM ALLOWING EXHAUST TO DAMAGE THE UPPER ALUMINUM MUFFLER ASSEMBLY SHROUD AND THE ENGINE INDUCTION COVER. SUGGEST THAT A VERY CLOSE INSPECTION BE DONE BY BOTH VISUAL AND PRESSURE CHECK METHODS OF ALL MUFFLER AND EXHAUST STACK WELD SEAMS.