What was found
CREW REPORTED DURING GROUND RUN AND PRIOR TO TAXI, ENGINE MADE A LOUD NOISE, AND THE ENGINE WAS SHUT DOWN IMMEDIATELY. THIS HAPPENED PRIOR TO FLIGHT, WITH NO INDICATION OF A PENDING FAILURE. MAINTENANCE TECHNICIAN REPORTED THAT THE ALTERNATOR HAD SEIZED, AND THE BELT HAD SEPARATED FROM THE GEAR RING AND WAS LAYING IN THE ENGINE COMPARTMENT. ATTEMPTS TO MOVE THE ALTERNATOR BY HAND WAS UNSUCCESSFUL. AN RMA HAS BEEN REQUESTED FOR WARRANTY PURPOSE. THIS ALTERNATOR HAS 56.1 HOURS SINCE INSTALLED APRIL 19, 2023 NEW.