What was found
AIRCRAFT LOST HYDRAULIC PRESSURE. RIGHT HAND INBOARD GEAR DOOR ACTUATOR LEAKING HYDRAULIC FLUID. REPLACED RIGHT INBOARD GEAR DOOR ACTUATOR WITH SERVICEABLE UNIT IAW LEARJET MODEL 25 SM. REPLACED BOTH ENGINE DRIVEN HYDRAULIC PUMPS AS A PRECAUTIONARY MEASURE. OPERATIONAL AND LEAK CHECK OF SYSTEM ACCOMPLISHED. AIRCRAFT RETURNED TO SERVICE. NO RECOMMENDATION KNOWN TO PREVENT RECURRENCE.