As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 4152 - DURING FLIGHT, CREW NOTICED THE NR 1 ENGINE N1 WAS LOW. THE ENGINE WENT INTO AUTO SHUTDOWN AND AIRCRAFT RETURNED TO IAH WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE B-SYSTEM FADEC IAW EMB-145 MM CHAPTER 73-22-01 AND AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (X)