What was found
FLAPS FAIL CAUTION MSG WHEN SELECTING FLAPS TO 20 ON THE AFTER START CHECK. ACFT WILL NEED A REPLACEMENT FLAP FAIL EVENT CARD. PERFORMED TROUBLESHOOTING IAW FIM, REV 44 IAW AD 2009-06-12, PARA H6I AMOL DATED DECEMBER 07.2012 AND PA AD 27-052L. FOUND SKEW DETECTION BOX WAS NOT RESET PROPERLY RESET SKEW DETECTION BOX IAW AMM 27-51-15, OPS CHECK GOOD. PERFORMED OP CHECK OF THE FLAP SYS IAW AMM 27-51-05 OP CHECK GOOD FECU FAULT LOG FLT 1322 1 FECU 2 LH MOTOR/BRAKE 3 RT MOTOR/BRAKE.