What was found
(CAN) FLIGHT CREW REPORTED LOSS OF NR 1 ENGINE OIL AND LOW OIL PRESSURE WARNING LIGHT ON FINAL APPROACH. PRECAUTIONARY ENGINE SHUTDOWN ACCOMPLISHED AND NORMAL LANDING CONDUCTED. NO FURTHER INCIDENTS TO REPORT. MAINTENANCE INSPECTION REVEALED BANJO FITTING ON THE OIL FILTER BYPASS SYSTEM LEAKING. ENGINEERS REPLACED THE NR 1 ENGINE ACCESSORY GEARBOX, S/N:'ON'KF3586, S/N:'OFF'DE5935 AND COMPLETED SYSTEM LEAK CHECK. NO FAULTS FOUND. AIRCRAFT RETURNED TO SERVICE WITH NO FURTHER INCIDENTS TO REPORT.