What was found
(CAN) GATE RETURN DUE TO ENGINE AUTO-SHUTDOWN. CUSTOMER REPORTED FAULT CODES 732133&732128. DURING FAULT ISOLATION, IT NOTED THAT OVERSPEED SHUTOFF CABLE SAGGING. ROTATING FAN BY HAND DID CAUSE LP TURBINE TO ROTATE, HOWEVER, IT MADE RATCHETY NOISE. REMOVAL OF TAIL CONE REVEALED THAT SHUTOFF CABLE WRAPPED AROUND LP TURBINE SHAFT BREAKAGE SENSING MECHANISM & THAT MECHANISM IN 35 DEG (FAILED) CONDITION. INVESTIGATION. AT RRC REVEALED THAT SHAFT, FUEL CUT OFF DRIVE SPLINES WERE MISASSEMBLED WITH TUBE REF FSO SPLINES. SPLINES WERE NOT ENGAGED & BOTH PART WERE TORQUED TOGETHER. AFTER FEW HRS OF RUNNING, SPLINES ENGAGED INTO THEIR LOCATION MAKING LP TURBINE ASSEMBLY LOOSE WHICH ACTIONED FUEL SHUTOFF MECH.