What was found
AIR RETURN TO CLT DUE TO STEERING INOPERABLE CAUTION MESSAGE. FLIGHT LANDED SAFELY BACK IN CLT. TRUCKS WERE ROLLED AND PLANE WAS TOWED TO THE GATE. NO OVERWEIGHT LANDING. CORRECTIVE ACTION: DISCOVERED LOOSE CANNON PLUGS ON NLG STEERING ACTUATORS. TIGHTENED CANNON PLUGS AND PERFORMED NLG EXTENSION AND RETRACTION. OPERATIONS CHECK, IAW CRJ 700 AMM 32-30-00-865-802. OPERATIONS CHECK GOOD, NO DEFECTS NOTED. 12/27/20: REMOVED AND REPLACED STEERING MANIFOLD, IAW CRJ 700 AMM 32-51-50-000/400-801, LEAK CHECK GOOD. INSPECTED NLG HARNESS CONNECTORS, IAW CRJ 700 AMM 32-20-00-210-801, NO DEFECTS NOTED. PERFORMED MULTIPLE NLG EXTENSIONS/RETRACTIONS TO VERIFY FAULT DOES NOT REOCCUR DURING GEAR TRAVEL, IAW CRJ 700 AMM 32-30-00-865-802. OPERATIONS CHECK GOOD.