What was found
THE NR 2 ENGINE OIL QUANTITY DECREASED TO EIGHT QUARTS DURING CRUISE, BUT THE QUANTITY STABILIZED. THE QUANTITY DECREASED TO FOUR QUARTS DURING APPROACH, BUT STABILIZED AGAIN. THE QUANTITY HAD DROPPED TO ZERO BY LANDING. THE NR 2 ENGINE WAS SHUTDOWN ON LANDING ROLL. THE NR 2 ENGINE WAS REMOVED AND REPLACED. THE SDR WILL REMAIN OPEN FOR PART INFORMATION PENDING INVESTIGATION. *S/D* SHOP FINDINGS REPORTED A WORN 4.5 CARBON SEAL AND SPACER.