Narrative:

On downwind for runway xxr at ZZZZ we received a flaps fail caution message when attempting to select flaps 8 degrees. We declared an emergency and asked for vectors while we ran checklists. ZZZZ arrival extended our downwind leg until we were ready for a base turn; which was about 15 mi out. All QRH procedures were followed and the flight standards manual was checked to verify adequate landing distance with emergency vehicles standing by. We made a flaps zero landing on runway xxr with no further problems.

Related reports:

Google
 

Original NASA ASRS Text

Title: CRJ200 CAPT REPORTS FLAPS FAIL CAUTION AFTER SELECTING FLAPS 8. QRH IS CONSULTED AND UNEVENTFUL FLAPS ZERO LANDING IS ACCOMPLISHED.

Narrative: ON DOWNWIND FOR RWY XXR AT ZZZZ WE RECEIVED A FLAPS FAIL CAUTION MESSAGE WHEN ATTEMPTING TO SELECT FLAPS 8 DEGS. WE DECLARED AN EMER AND ASKED FOR VECTORS WHILE WE RAN CHKLISTS. ZZZZ ARR EXTENDED OUR DOWNWIND LEG UNTIL WE WERE READY FOR A BASE TURN; WHICH WAS ABOUT 15 MI OUT. ALL QRH PROCS WERE FOLLOWED AND THE FLT STANDARDS MANUAL WAS CHKED TO VERIFY ADEQUATE LNDG DISTANCE WITH EMER VEHICLES STANDING BY. WE MADE A FLAPS ZERO LNDG ON RWY XXR WITH NO FURTHER PROBS.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.