What was found
IN FLIGHT,GEAR WOULD NOT RETRACT. DURING PUSHBACK FROM GATE, NOSE GEAR WAS TURNED PAST ITS LIMIT. NOSE WHEEL STEERING WAS THEN REPORTED INOPERATIVE. MAINTENANCE INSPECTED AND REPLACED ELECTRO HYDRAULIC STEERING VALVE IAW MFG MM. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE. AFTER TAKE OFF THE NOSE GEAR WOULD NOT RETRACT AND FLIGHT RETURNED. THE AIRCRAFT WAS THEN FERRIED WITH THE GEAR PINNED. MAINTENANCE INSPECTED AND REPLACE THE NOSE GEAR SHOCK STRUT ASSEMBLY IAW MFG MM. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.