What was found
LOSS OF RIGHT HYDRAULIC SYSTEM QUANTITY AND PRESSURE OCCURRED IMMEDIATELY AFTER GEAR RETRACTION. NOSE GEAR RETRACTED NORMALLY BUT BOTH MAIN GEARS WERE STILL EXTENDED WITH GEAR DOOR OPEN LIGHT ILLUMINATED. FLIGHT WAS RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND BROKEN HYDRAULIC LINE AT AUXILIARY HYDRAULIC PUMP. REPLACED LINE, AUXILIARY PUMP, RIGHT ENGINE DRIVEN PUMP, AND ALL FILTERS. LEAK AND OPERATIONAL CHECK NORMAL.