What was found
LOST ALL HYDRUALIC PRESSURE IN FLIGHT, AUX PRESSURE WORKED OK. FOUND HYDRUALIC LEAK IN LEFT MAIN GEAR WELL AIRFRAME FITTING TO RETRACT SIDE OF MAIN GEAR ACTUATOR. TIGHTENED FITTING TO RETRACT ACTUATOR PER LEARJET MAINTENANCE MANUAL 20-30-00, SERVICED RESERVIOR PERFORMED RETRACTION AND EXTENSION FUNCTION CHECK OF LANDING GEAR PER LEARJET MAINTENANCE MANUAL 32-33-00 APGE 201, SERVICED EMERGENCY AIR BOTTLE AND PERFORMED OPERATIONAL CHECK OF ENGINE DRIVEN HYDRUALIC PUMPS, ALL SYSTEMS FUNCTION CHECK SATISFACTORY AIRCRAFT RETURNED TO SERVICE.AIRCRAFT RETURNED TO SERVICE.