A CRJ200 FLAPS FAILED AT 30 DEGREES DURING FLAP SELECTION FOR LNDG. A GAR WAS EXECUTED AND AN EMER DECLARED. AFTER THE QRH WAS CONSULTED A NORMAL LNDG FOLLOWED.

Narrative

WHILE ON A VISUAL APPROACH TO ZZZ I CALLED FOR FLAPS 30 AND WHEN THE CAPTAIN SELECTED THE FLAP SETTING; THE FLAPS MOVED TO 30 DEGREES AND WHEN THEY GOT THERE; WE RECEIVED A FLAPS FAIL MESSAGE. IMMEDIATELY WE WENT AROUND; INFORMING ATC THAT WE WOULD NEED SOME TIME TO WORK OUT OUR PROBLEM. AS I FLEW THE PLANE AND HANDLED THE RADIOS; THE CAPTAIN RAN THE FLAPS FAIL QRH PROCEDURE. HE ALSO INFORMED THE FLT ATTENDANT AS TO WHY WE HAD GONE AROUND. THE CAPTAIN CALCULATED THE APPROPRIATE NUMBERS AND CONFIRMED WITH DISPATCH THAT THE NUMBERS WERE SAFE AND CORRECT. THE CAPTAIN TALKED TO MAINT AND AGREED THAT IT WAS SAFE TO CONTINUE TO LAND. BY THIS POINT; WE HAD DECLARED AN EMERGENCY WITH ATC. ONCE EVERYONE HAD BEEN CONTACTED AND ALL THE NUMBERS CROSSCHECKED WE COMMENCED ANOTHER VISUAL APPROACH AND HAD AN UNEVENTFUL LANDING. ONCE WE WERE CLEAR OF THE RUNWAY WE INFORMED ATC THAT WE NO LONGER NEEDED ASSISTANCE AND TAXIED TO THE GATE. THE CAPTAIN HAD ME LEAVE THE FLAPS IN THE FLAP 30 POSITION INSTEAD OF RETRACTING THEM. ONCE WE GOT TO THE GATE THE PASSENGERS DEPLANED AND THANKED US FOR THE GOOD FLIGHT AND LANDING AND DID NOT SEEM SCARED. THE CAPTAIN AND I ASKED THE FA HOW SHE WAS DOING AND SHE INDICATED THAT EVERYONE HAD BEEN CALM AND SHE WAS FINE HERSELF. WE LEFT THE PLANE WITH MAINT PERSONNEL THAT ARRIVED AND WENT TO THE HOTEL.