What was found
THE NR 1 ENGINE OIL QUANTITY DROPPED TO ZERO ACCOMPANIED BY ILLUMINATION OF THE LOW OIL PRESSURE LIGHT WHILE ENROUTE FROM CAE TO EWR. THE ENG WAS SHUTDOWN AND THE A/C WAS DIVERTED TO BWI WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND BOTTOM STUD ON NR 1 ENGINE GEARCASE BLOWN OUT. A STUD REPAIR WAS PERFORMED PER CMM 72-61-01, REPAIR 1, PAGE 901-904. THE ENGINE OIL WAS SERVICED TO FULL. OPERATIONAL AND LEAK CHECKS GOOD.