What was found
FLAPS FAILED AT 43 UPON FINAL APPROACH. OAT 3C. PERFORMED TROUBLESHOOTING PER BOMBARDIER FIM REV 39 IAW AD 2009-06-12 PARAGRAPH (H)(6)(I), AMOC DATED MARCH 27, 2009, TR#27-012 PER AMOC DATED DECEMBER 18, 2009 AND PA AD27-05AG. FECU CODES 11 2A, 11 2B, 15 2A, 15 2B, 29 BC, A.C SUPPLY NR 2, FECU, RT /MOTOR BRAKE. REMOVED AND REPLACED PDU IAW AMM 27-52-01. OPC GOOD. VERIFIED PART EFFECTIVITY. PLACARD REMOVED. THIS CLEARS DM 55359. OK FOR SERVICE.