What was found
(CAN) ONE-HALF HOUR INTO FLIGHT THE #2 ENGINE OIL QUANTITY DROPPED TO ZERO, WITH OIL PRESSURE FLICKERING AND OIL PRESSURE DROPPING TO AMBER BAND. #2 ENGINE SHUTDOWN. POST FLIGHT INSPECTION FOUND INTEGRATED DRIVE GENERATOR (I.D.G.) QUADRANT RING SCREW SHEARED AND I.D.G. SHAFT SHEARED. REPLACED I.D.G. AND QUADRANT RING ASSEMBLY. GEARBOX INSPECTED AND ENGINE GROUND RUN SERVICEABLE.