What was found
DURING OVERHAUL ASSY OF THE POWER SECTION AND 1ST STAGE REDUCTION CARRIER MACHINE HEX BOLT P/N MS9490-34 FAILED IN THE THREADED PORTION OF THE BOLT UNDER APPLIED TORQUE DURING INSTALLATION. THE BOLT IS USED IN THE ASSEMBLY OF THE 1ST STAGE REDUCTION GEARING CARRIER IAW P&WC O/H MANUAL P/N 3038337, SECTION 72-10-00, PAGE 503, PARAGRAPH NR B. THERE ARE TOTAL QTY. 6 BOLTS INSTALLED IN THE CARRIER WITH KEY-WASHERS AND ARE TORQUED TO 75 TO 85 IN-LBS. THE BROKEN PARTS HAVE BEEN DISPATCH TO P&WC FOR FAILURE INVESTIGATION. NOTE: THE ENGINE HAD PREVIOUSLY BEEN INVOLVED IN A PT BLADE FAILURE.