What was found
AFTER TAKEOFF FROM BWI, THE LANDING GEAR WOULD NOT RETRACT. THE LEFT MAIN GEAR INDICATED RED, THE NOSE GEAR INDICATED YELLOW, AND THE RIGHT MAIN GEAR DOOR INDICATED YELLOW. AIRCRAFT RETURNED TO THE FIELD. MAINTENANCE PERFORMED AN INSPECTION AND THE AIRCRAFT FERRIED GEAR DOWN TO MDT FOR REPAIRS. MAINTENANCE INSPECTED, BLED THE HYDRAULIC SYSTEM AND PERFORMED RETRACTION TESTS. SYSTEM OPERATIONALLY CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)