What was found
ON FLIGHT 3650 DURING THE DESCENT THE CREW REPORTED A FLAP FAIL ON EICAS WHEN SELECTING FLAPS AT 22 DEGREES. FLAP FAIL CAUTION ILLUMINATED AND FLAPS INDICATED 11 DEGREES. RETRACTED FLAPS TO 0 DEGREES AND STILL INDICATED 11 DEGREES ON THE GROUND. CYCLED FLAPS 22 DEGREES AND BACK TO 0 FLAPS INDICATED 11 DEG. THE CAPTAIN DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE FLAP MOTOR UNIT AMM 37-53-01 FLAP ELECTRONIC CONTROL UNIT IAW EMB AMM 27-53-02 AND FUSE IAW EMB STANDARD PRACTICES TASK 20-13-08-200-801-A AND TASK 20-13-08-420-001 A00. THE AIRCRAFT WAS RETURNED TO SERVICE.