What was found
(CAN) DURING LINE-UP WHEN TAKEOFF POWER WAS APPLIED, AT 1.4 EPR, A LOUD BANG WAS HEARD FOLLOWED BY A RISE IN EGT TO 585 DEGREES CELSIUS, ON NR 2 ENGINE. THE ENGINE WAS SHUT DOWN AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTION FOUND THE T4 TURBINE HAD FAILED. THERE WAS NO VISIBLE BLADE PENETRATION THROUGH THE CASE. THE NR 2 ENGINE WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.