What was found
MCO - FLT 2763 - ON TAKEOFF ROLL, OIL QTY ON THE NR 2 ENGINE WENT FROM 3.6 GALLONS TO 1 GALLONS. THE TOWER ALSO REPORTED SMOKEON TAKEOFF ROLL FROM THE SAME ENGINE. CAPTAIN ELECTED TO RETURN TO FIELD AT MCO. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENA NCE FOUND THE NR 2 ENGINE MAIN OIL FILTER LEAKING. REPLACED OIL FILTER(P/N ACC 336F1665) AND O-RINGS (P/N RD3018). RAN ENGINE. NO LEAKS NOTED. (M)