What was found
ON FLIGHT 2977 THE CREW REPORTED THAT DURING LANDING WHEN SELECTED FLAPS TO 9%. THE CREW RECEIVED A CAUTION MESSAGE FLAP FAIL AND EICAS INDICATION 0%. COMPLIED WITH AOM VO L 1 AND DECLARED AN EMERGENCY. THE CREW CALLED FOR CFR AS A PRECAUTIONARY MEASURE. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AICRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED FLAP ELECTRONIC CONTROL UNIT IAW EMB 145 AMM 27-53-02. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.