What was found
AIRINC MESSAGE BY CREW REPORTED RIGHT HYDAULIC QUANTITY EICAS IN FLIGHT, RIGHT HYDRAULIC PUMPS SHUT DOWN AT FLIGHT LEVEL 360. RIGHT HYDRAULIC INDICATOR LIGHT CAME ON FOLLOWED BY FLUCTUATION OF PRESSURE 3000 TO 2900. ACCOPLISHED ATI QUICK REFERENCE HANDBOOK AND RIGHT HYDRAULIC SYSTEM WAS SHUT DOWN AT FLIGHT LEVEL 3. AS A PRECAUTION CREW DECLARED EMERGENCY. AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT WAS GROUNDED FOR INSPECTION AND MAINTENANCE. REMOVED AND INSPECTED BOTH DIFFERENTIAL PRESSURE INDICATOR AND BOTH PRESSURE SWITCHES FROM ENGINE DRIVEN PUMP PRESSURE/CASE DRAIN MODULE. REPLACED FAILED PACKINGS IN ACCORDANCE WITH B767 AMM 29-11-17. REMOVED AND REPLACED FILTER ELEMENT IN ACCORDANCE WITH B767 AMM 29-11-17. ACCOMPLISHED EXTERNAL LEAK CHECK OF PRESSURE/CASE DRAIN MODULE IAW B767 AMM 29-11-00 AFTER 5 MINUTE AT IDLE NO LEAKS NOTED.