What was found
EWR - FLT 4023 - CREW REPORTED DURING CLIMB-OUT, RECEIVED A LOW N1 WARNING ON THE LEFT ENGINE. THE ENGINE WAS SHUT DOWN AS A PRECAUTION AND THE AIRCRAFT RETURN TO FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LEFT ENGINE COMPRESSOR VARIABLE GUIDE VANE ACTUATOR IAW EMB-145 MM 75-33-01. OPERATIONAL CHECKS WERE SATISFACTORY, FEDEC 1A WAS ALSO REMOVED AND REPLACED FOR PRECAUTIONARY MEASURES. AIRCRAFT RELEASED FOR SERVICE. (M)