What was found
WHEN POWER WAS REDUCED ON FINAL APPROACH, THE RT ENGINE OIL PRESSURE WARNING ILLUMINATED. THE FLIGHT CREW DECLARED AN EMERGENCY AND SHUTDOWN RT ENGINE USING THE APPROVED CHECKLIST. AN OTHERWISE UNEVENTFUL LANDING WAS MADE. MAINTENANCE FOUND THE ACCESSORY GEARBOX DRIVE PLUG LEAKING. NEW PLUG AND O-RING WAS INSTALLED. THE ENGINE WAS SERVICED WITH OIL AND GROUND LEAK CHECKED WITH NO FURTHER LEAKAGE.