What was found
FLAP FAIL ON RETRACTION. PERFORMED TROUBLESHOOTING PER BOMBARDIER FIM REV 39 IAW AD2009-06-12 PARAGRAPH (H),(6),(1).AMOC DATED MARCH 27-2009,TR #27-012 D PER AMOC DATED DECEMBER 18,2009 AND PAAD27-052G, REMOVED AND REPLACED SKEW DETECTION UNIT IAW AMM 27-51-04, OPS CHECK GOOD THIS CLEARS DM 63681.