What was found
ON T/O AT APPROX 90 KIAS LOUD BANG,AC SWERVED TO THE LEFT AND VIBRATION IN SEAT. ABBORTED T/O. AC RETURNED TO GATE AND MAINTENCE GROUNDED AC. CONDUCTED T/S PER FIM 71-05 FT 848 AND STALL INSPECTION PER AMM 72-00-00/601. METAL DEBRIS FOUND IN TURBINE EXHAUST, PER FIM AND AMM, L ENGINE REPLACEMENT REQUIRED. SEE L/P 38704-73 FOR FURTHER ACTION. A/C VERIFIED NO ETOPS. A BORESCOPE WAS ACCOMPLISHED AND ENGINE WAS DAMAGED BEYOND LIMITS AND REQUIRES AN ENGINE CHANGE, IT IS SCHDULED FOR 1/14/24 IN MEM . AN AMENDED REPORT WILL BE SENT AFTER THE CORRECTIVE ACTION IS ACCOMPLISHED . REMOVED AND REPLACED #1 ENGINE DUE TO DAMGE OPS CHECK GOOD AC RETURNED TO SERVICE.CHANGED LH ENGINE IAW ABX J/C 71-999-04-01 OPS CHECK GOOD