What was found
(CAN) ACFT DEPARTED FOR A MAINTENANCE TEST FLIGHT. PART WAY THROUGH THE CVR TEST, THE PILOTS RECEIVED THE MASTER CAUTION, NR 2 LOW OIL PRESSURE CAUTION LIGHT. THE GAUGE CONFIRMED LOW OIL PRESSURE SO THEY SHUTDOWN NR 2 ENGINE AND RETURNED TO DEPARTURE AIRPORT. THE ACFT LANDED WITH NO FURTHER INCIDENT. THE ACCESSORY GEAR BOX OIL SEAL FOR THE ENGINE DRIVEN FUEL PUMP WAS FOUND TO BE LEAKING CAUSING THE ENGINE OIL TO BECOME DEPLETED BELOW MINIMUM LEVELS. THE OIL SEAL WAS REPLACED AND THE ENGINE DRIVEN FUEL PUMP AND FUEL CONTROL UNIT WERE ALSO REPLACED DUE TO OIL CONTAMINATION.