What was found
DURING INSPECTION, P/N 1455017-1 AND P/N 1455017-2 BRACE ASSYS WERE FOUND CHAFING ON THE PN 629671A2 OIL SUMP. THE P/N 1555001-1 MUFFLER CAN MOVE FWD AND AFT DUE TO ENG VIBRATION AS THERE ARE NO DOWL PINS IN P/N 1555001-1 CLAMPS TO MAINTAIN POSITION OF MUFFLER. SUBMITTER RECOMMENDED UPGRADING MUFFLER SYS TO DUAL MUFFLERS LIKE FRONT ENGINE INSTALL OF THIS ACFT, OR AT LEAST THE INSTALL OF DOWL IN P/N 1555002-1 CLAMPS. THIS IS THE THIRD OCCURRANCE ON THE ACFT IN THE LAST 5 YEARS. (X)