What was found
IN THE BEGINNING OF THE TAKEOFF ROLL WITH THRUST SELECTED, THE RIGHT ENGINE DID NOT RESPOND TO THROTTLE ADVANCEMENT & THE TAKEOFF WAS REJECTED. THEN DURING THE SECOND TAKEOFF ROLL WITH THE AUTO THROTTLE SELECTED OFF, THE RIGHT ENGINE FAILED TO ACCELERATE, CAUSING ANOTHER REJECTED TAKEOFF. THE AIRPLANE WAS REMOVED FROM SERVICE AND METAL PARTICLES WERE FOUND IN THE TAIL PIPE. THE RIGHT ENGINE WAS REPLACED. THE CAUSE OF THE LACK OF RESPONSE TO THROTTLE ADVANCEMENT WAS THE INTERNAL FAILURE OF THE RIGHT ENGINE.