What was found
PANC - DURING CRUISE AT FL330, NR 2 ENG OIL QTY BEGAN DROPPING, THEN FWD ANNUNCIATOR LOW OIL PRESSURE LIGHT FLICKERED, ENGINE WAS SHUT DOWN, OIL PRESSURE WAS 15 PSI, WITH N2 25 PERCENT, N1 29.5 PERCENT, OIL QTY READING ONE GALLON AFTER SHUTDOWN. ENGINE PARAMETERS WERE NORMAL ON SHUTDOWN, OIL PRESSURE WAS INDICATING 15 PSI FOR DURATION OF FLIGHT. FOUND NR 2 ENGINE GEARBOX AT CSD DRIVE DAMAGED. REMOVED AND REPLACED ENGINE IAW MM 71-00-02. (M)