What was found
DURING FLIGHT, THE TRANSMISSION PRESSURE CAUTION LIGHT ILLUMINATED. THE PRESSURE GAUGE INDICATED 30 PSI. DURING FINAL APPROACH, PRESSURE DROPPED TO 20 PSI AND TO 10 PSI DURING HOVER. UPON LANDING, PRESSURE RETURNED TO 25 PSI. AIRCRAFT WAS INSPECTED AND THE TRANSMISSION OIL LEVEL WAS FOUND LOW. THE ENGINE GEARBOX SEAL WAS DETERMINED TO BE LEAKING. SEALS WERE REPLACED. ENGINE OIL AND EXTERNAL FILTER WERE CHANGED. TRANSMISSION CHIP PLUGS WERE ALSO CHECKED. NO DEFECTS NOTED.