What was found
DURING CRUISE, THE CREW NOTICED A DROP IN OIL PRESSURE AND TEMPERATURE. THE CREW CALLED MAINTENANCE CONTROL, DECLARED AN EMERGENCY, AND SHUT DOWN THE #2 ENGINE. THE CREW THEN LANDED IN STL WITH NO FURTHER INCIDENTS. MAINTENANCE CONTROL SENT MECHANICS FROM PIT TO STL. MAINTENANCE THEN INSPECTED AND FOUND AN O-RING ON THE OIL COOLER NOZZLE DEFORMED ALLOWING OIL TO DRAIN FROM THE ENGINE. MAINTENANCE REPLACED THE O-RING IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 79-00-00. OPERATIONAL AND LEAK CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.