What was found
EWR - FLT 0480 - SMOKE ENTERED THE CABIN IMMEDIATELY AFTER TAKEOFF FROM BWI. THE AIRCRAFT WAS RETURNED TO BWI WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND OIL LEAKING FROM THE NR 1 ENGINE FRONT ACCESSORY PAD WHICH WAS CRACKED IN SEVERAL PLACES. THE FRONT ACCESSORY PAD WAS REPLACED. A BURN-OUT OF HIGH PRESSURE PNEUMATIC DUCTING WAS PERFORMED IAW MM 21-20-02 BOTH COALESCER BAGS WERE REPLACED. THE NR 1 ENGINE WAS RUN AND OPERATION CHECKED GOOD WITH NO FURTHER SMOKE OBSERVED. (X)