What was found
EWR - PHX - IFSD - CREW REPORTED HEARING A "BANG" FOLLOWED BY THE NR 1 ENGINE SHUTTING DOWN. CREW INITIATED AN IN-FLIGHT RESTART OF THE NR 1 ENGINE, ENGINE STARTED AND UPON APPLICATION OF POWER ANOTHER BANG WAS HEARD FOLLOWED BY THE NR 1 ENGINE SHUTTING DOWN. THE CREW DECLARED AN EMERGENCY AND DIVERTED TO SDF. THE LANDING WAS UNEVENTFUL. THE A/C TAXIED TO THE GATE. MX PERFORMED A BOROSCOPE OF THE NR 1 ENGINE. MX DISCOVERED DAMAGE TO BLADES FROM STAGE 7 THRU STAGE 12. MX REPLACED THE NR 1 ENGINE PER TASK CARD R5M71302. ENGINE POWER RUNS WERE GOOD. THE A/C WAS RETURNED TO SERVICE.