What was found
FLIGHT 11323-1 KFRG-KACY: AFTER TAKEOFF, THE RIGHT ENGINE LOW OIL PRESSURE AURAL WARNING ACTIVATED. THE CREW NOTICED THE RIGHT ENGINE OIL PRESSURE DROPPING ON THE ANALOG INDICATOR. CREW FOLLOWED PROCEDURES AND SHUT-DOWN THE RIGHT ENGINE BEFORE THE OIL PRESSURE DROPPED ZERO. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO KFRG AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE RIGHT ENGINE OIL COOLER BY-PASS LINE HAD RUPTURED ALLOWING ENGINE OIL TO LEAK OUT. THE BY-PASS LINE WAS REPLACED; ENGINE OIL SERVICED AND A GROUND RUN WAS PERFORMED WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.