What was found
FLT 40. AFTER ADVANCING THE THROTTLES THE CREW NOTED THE NR 2 ENGINE LOW OIL PRESSURE LIGHT ILLUMINATE FOLLOWED BY A DECREASE IN NR 2 ENGINE OIL QUANTITY. THE CREW ABORTED THE TAKE-OFF AND SHUTDOWN THE NR 2 ENGINE AND RETURNED TO THE CARGO RAMP. MAINTENANCE FOUND ONE OF THE THREADED INSERTS FOR THE BOLTS THAT SECURE THE OIL FILTER COVER FAILED AND THE COVER SEPARATED FROM THE ENGINE ACCESSORY GEARBOX. MAINTENANCE REMOVED AND REPLACED THE ENGINE ACCESSORY GEARBOX IN ACCORDANCE WITH FORM M-230. OPERATIONAL AND LEAK CHECK FOUND SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.