As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE ANTI ICE FAIL MESSAGE DURING PNEUMATIC INFLIGHT TEST. TURNED ICE DETECTION KNOB TO AUTO AND THE NR 1 ANTI ICE VALVE REMAINED OPEN. VALVE CLOSED AFTER SECOND ATTEMPT. SWITCHING ALL TO AUTO. PERFORMED CONTINUITY AND VOLTAGE TEST AND FUNCTIONAL TEST OF PRESSURE TRANSDUCER OF NR 1 ANTI-ICE SYSTEM IAW WM 30-20-50 AND AMM 30-21-00-700-801. NO DEFECTS NOTED. REMOVED AND REPLACED THE NR 1 ANTI ICE VALVE IAW AMM 30-21-01. OPS TESTED GOOD.