What was found
SUN-ON FLIGHT 2408 ABORTED TAKEOFF, POWER LEVERS WERE ADVANCED TO RATING DETENT TAKEOFF TORQUE WAS ACHIEVED ON BOTH ENGINES AT ABOUT 70 KIAS HEARD LOAD BANG. AIRCRAFT VEERED OFF CENTERLINE TO LEFT, ABORTED TAKEOFF, AS I BROUGHT POWER BACK NOTICED "UPTRIM" DISPLAYED ON ED IN REVERSE VIDEO MOMENTARILY. AS WE PULLED OFF RUNWAY, ENGINE INDICATIONS WERE NORMAL. NOTICED ODOR OF SMOKE IN COCKPIT, AS WE RETURNED TO GATE, FA'S REPORTED SOME SMOKE IN THE CABIN, BUT IT WAS DISSIPATING. BOTH ENGINE APPEARED TO RUN NORMALLY AFTER ABORTED TAKEOFF. MAINTENANCE BOROSCOPE REVEALED INTERNAL DAMAGE TO NR 1 ENGINE, REPLACED ENGINE. ALL POST MAINTENANCE CHECKS TEST GOOD. AIRCRAFT RETURNED TO SERVICE.