What was found
1:30HR INTO FLIGHT AT 36000 ENG 4 OIL QTY INDICATED 10 MAGENTA, DECREASED APPROX EVERY 10-20 MINS. 0 QTS INDICATED AT TOP OF DESCENT, DURING DESCENT IT INDICATED 1QT, LDG 0 QTS, & ENG SHUTDOWN 2 QTS. AFTER ENG 4 EDP REMOVAL, FOUND EDP DRIVE SHAFT MISSING PACKING. INSTALLED PACKING AND NEW GASKET, AND ORIGINAL EDP INSTALLED IAW AMM 29-11-04/401. PERFORMED OPS TEST AND ENG IDLE RUN. OPS CHECK GOOD IAW AMM 71-00-00. PFMD ENG #4 IDLE RUN IAW AMM 71-00-00, NO LEAKS NOTED. AFTER 10 MIN OF IDLE, 19 QTS BEFORE START, 19 QTS AFTER ENG SHUTDOWN, OPS CHECK GOOD.