What was found
DURING GROUND RUN, AFTER SCHEDULED TURBINE REPLACEMENT, LEAK CHECKS HAD BEEN COMPLETED AT IDLE POWER. WHILE ADDING POWER, AT ABOUT 85 PERCENT N2 THE NR3 TURBINE WHEEL EXPERIENCED AN UNCONTAINED FAILURE DESTROYING THE ENGINE AS WELL AS DAMAGING THE COWLING, ROTOR BLADES, AND ENGINE PAN AND STRUCTURE. THE CAUSE IS UNDER INVESTIGATION BY MFG.