What was found
DURING TAKEOFF, THE LEFT ENGINE FAILED AT ABOUT 100 KNOTS AIRSPEED WITH AN ASSOCIATED EPR INDICATION OF 1.0, A DECREASE OF N1 AND N2 RPM SPEED, AND A NOTICEABLE ENGINE VIBRATION. TAKEOFF WAS ABORTED WITHOUT INCIDENT AND THE FLIGHT RETURNED TO BLOCKS. MAINTENANCE REPLACED THE LEFT ENGINE. OPERATIONAL CHECK OK.