What was found
AIRCRAFT RETURNED TO CLT AFTER RECEIVING NWS STEERING INOP MSG. ARFF RESPONDING. RTF-NOSEWHEEL STEERING INOP IN FLIGHT / T/S B1 CODE 007464 PER CRJ 900 FIM 32-51-50-810-801, REMOVED AND REPLACED NWS STEERING MANIFOLD IAW CRJ 900 AMM 32-51-50-000/400-801, OPS AND LEAK CHECK NEED C/W AND TOP LEFT MOUNTING BOLT, NOSE LIGHT BOLTS, AND THROUGH BOLT BEHIND HEADLIGHT NEED SAFETIED. FINISHED INSTALLATION OF NWS MANIFOLD PER JOB STOP ( SEE AML 20163-19 #1/ RRFKS008JC8E FOR DETAILS) IAW CRJ 900 AMM 32-51-50-400-801. PERFORMED OPS TEST OF THE NWS, OPS TEST PASSED. PERFORMED LEAK CHECK OF THE NWS, NO LEAKS DETECTED. PERFORMED POSSIBLE CAUSE-1 (DEFECTIVE WIRING) IAW CRJ 900 FIM 32-51-50-810-801. NO DEFECTS NOTED AT THIS TIME.