As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4757 - DURING APPROACH WHEN FLAPS WERE SELECTED CREW RECEIVED A FLAP FAIL, FLAP LOW SPEED, AND LOST FLAP INDICATION ON EICAS. AN EMERGENCY WAS DECLARED AND AIRCRAFT WAS LANDED WITHOUT FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED THE FLAP ELECTRONIC CONTROL UNIT IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)