What was found
FLIGHT 4006 RECEIVED FLAP FAIL MESSAGE WHEN FLAPS SELECTED 20-30 DEGREES ON APPROACH INTO MSP. FLAP 20 DEGREES LANDING QRH COMPLETED MAX BRAKE TEMP 03 GREEN. PERFORMED TROUBLESHOOT PER BOMBARDIER FIM REV 44 IAW AD 2009-06-12 PARA (L) (6) (I), AMOC DATED DEC 7, 2012 AND PA AD 27-05-2J. REMOVED AND REPLACED LEFT OUTBOARD FLAP ACTUATOR AND LEFT INBOARD FLAP INBOARD AND OUTBOARD ACTUATORS IAW AMM 27-53-01. OPS CHECK NORMAL.