What was found
RNO - ON FLIGHT 2440, AFTER SELECTING GEAR DOWN, RECEIVED THE FOLLOWING CAUTION LIGHTS, NR 2 HYDRAULIC ISO VALVE. ELEVATOR PRESSURE. SPOILER OUTBOARD. ROLL SPOILER OUTBOARD. GEAR EXTENDED AND LOCKED BUT GEAR DOORS (ALL) STAYED OPEN, HYDRAULIC QUANTITY IN NR 2 SYSTEM DROPPED TO NEAR ZERO, PERFORMED EMERGENCY/ABNORMAL CHECKLIST. MAINTENANCE REMOVED AND REPLACED FLEX/HRAD LINES. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.