EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition
Aircraft
After joining the localizer and being cleared for the ILS the Captain called for Flaps 9. When selected; the caution message 'FLAP FAIL' appeared on the EICAS. I told the Approach Controller that we needed to break off the approach and be vectored in a box pattern while we ran the checklist. I read the QRH procedure for flap failure while the Captain flew the aircraft. Per the QRH we adjusted our approach speeds as necessary; verified that we had enough runway to safely land the aircraft; and pulled the GPWS circuit breaker. After completing the checklist we notified the flight attendant of the issue and briefed her on our arrival. We then declared an emergency with the approach controller and were vectored back onto the ILS. The landing and rollout were normal and we taxied to the gate without further issue.Threat: One flap channel had failed before takeoff and was on MEL. Threat: gusty winds at [destination].
EMB-145XR First Officer reported receiving 'FLAP FAIL' EICAS caution message on approach.