What was found
CLT - FLT 1050 - AFTER TAKEOFF FROM CLT, EN ROUTE TO BNA, CREW REPORTED THE LOW OIL PRESSURE LIGHT FOR THE NR 2 ENGINE CSD ILLUMINATED. THE NR 1 ENGINE CSD WAS ALREADY ON MEL. FLIGHT RETURNED TO FIELD AT CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE CSD, P/N 735511A, AND AIR/OIL COOLER. CLEARED MEL ON NR 1 ENGINE CSD BY REPLACING THE CSD, P/N 735511A. OPERATIONAL CHECK AND LEAK CHECK GOOD. (M)