What was found
DURING AN ANNUAL INSPECTION, THE MUFFLER ASSEMBLY WAS REMOVED TO REPLACEMENT. AT THIS TIME IT WAS DISCOVERED THAT THE MUFFLER SHROUD INLET SCAT TUBE WAS MAKING CONTACT WITH THE LOWER LEFT SIDE ENGINE MOUNT LEG. NO VISIBLE DAMGE TO THE SHROUD ASSEMBLY. A DEEP GOUGE LINE WAS VISIBLE ON THE ENGINE MOUNT. AIRCRAFT RECORDS INDICATE THAT CUB CRAFTERS SERVICE BULLETIN SB0010 WAS PREVIOUSLY COMPLIED WITH AND NO OTHER RECORDS INDICATE REMOVAL OR INSTALLATION OF THE MUFFLER ASSEMBLY. COMPLIANCE WAS ACCOMPLISHED IN ACCORDANCE WITH PARAGRAPH 3. THE MECHANIC FOUND MORE THAN 0.25 INCHES OF CLEARANCE.