What was found
ON FLIGHT 4243 (BUF TO DTW) ON APPROACH INTO DTW AT 195 KNOTS FLAPS WERE SELECTED TO 20 DEGREES AND RECEIVED FLAPS FAILED MESSAGE AT 0 DEGREES. QRH COMPLETED WITH NORMAL LANDING AT FLAPS 0 DEGREES. PERFORMED TROUBLESHOOTING PER BOMBARDIER FIM REV 44 IAW AD 2009-06-12 PARAGRAH (H)(HG)(I), AMOC DATED DECEMBER 07,2012 AND PA AD 27-052J. COMPLIED WITH CRJ200 HEALTH CHECK IAW CHECKLIST PROVIDED. SEE NON-ROUTINE WORKCARD N38985 FOR COMPONENT REPLACEMENT AND FURTHER DETAILS.