What was found
WHILE DESCENDING TO LAND, HYD VOLUME LOW CAS MESSG POSTED. VISUAL CHECK NOTED HYD PRESS AT 300 PSI. VOLUME WAS DOWN TO 110 CU IN. HYD VOL LOW CHECKLIST CONSULTED. AIRCRAFT WAS SLOWED TO GEAR EXTENSION SPD AND GEAR WAS EXTENDED. LANDING GEAR EXTENDED. HYDRAULIC VOLUME DECREASED TO 40 CU IN AND PRESS WENT TO ZERO AFTER BOTH HYD PUMPS WERE UNLOADED. HYD RESIDUE WAS ALONG RT ENG. LANDING WAS NORMAL. EMER BRAKE WAS USED. TROUBLESHOT HYD LEAK TO RT HYD LOW PRESS SW IN RT PYLON. INSTALLED NEW PACKING. SERVICED HYD SYSTEM BLED SYSTEMS. RAN AIRCRAFT. PRESSURE AND LEAK CHECKS GOOD. WORK PERFORMED IAW CHAPTERS 32-42-10 AND 12-12-06 OF THE M/M.