What was found
DURING SCHEDULED INSPECTION, MECHANIC NOTED BURNING AROUND THE AREA OF THE EXHAUST OUTLET. IT WAS NOTED THAT THE BURNING, CRACKING AND DEBONDING HAD TAKEN PLACE IN A 12 X 9 AREA. FURTHER INSPECTION REVEALED THE CAUSE COULD BE FROM AN ENGINE BREATHER TUBE THAT IS INSERTED THROUGH THE UPPER PORTION OF THE EXHAUST TAIL PIPE, THIS ASSEMBLY AT THE TAIL PIPE HAS NO GASKET AND COULD ALLOW HOT EXHAUST GASSES TO ESCAPE INSIDE THE COWLING AND TRAVEL TO THE POINT ON THE COWLING THAT SUFFERED THE BURNING. SUGGEST A HEAT REFLECTIVE SHIELD BE INSTALLED IN THIS PORTION OF COWLING OR A GASKET FIT AT THE TAIL PIPE AND ENGINE VENT JUNCTION.