What was found
AIRCRAFT WAS NOT GROUNDED, AFTER DEPARTING PHL, FLIGHT CREW NOTED LOW OIL PRESSURE ON THE NR 2 ENGINE IDG, DISCONNECTED THE IDG, DECLARED AN EMERGENCY AND RETURNED TO PHL WHERE THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE NR 2 IDG OIL SYSTEM OVERSERVICED, DRAINED THE OIL TO THE CORRECT LEVEL AND RE-CONNECTED THE IDG. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 24-12-00.