What was found
AT 18,000 FT, ECAM DATALINK ATSU FAULT WITH STRONG ELECTRICAL ODOR IN THE COCKPIT. PULLED CIRCUIT BREAKERS L-15 & 16 AND THE ODOR DISSIPATED SLOWLY. ACCOMPLISHED TSM 24-00-00-810-803-A, IDENTIFIED ATSU COMPUTER TO HAVE THE BURNING ODOR INTERNALLY. NO DEFECTS NOTED TO BACKPLANE AND CONNECTOR. NO OTHER DEFECTS NOTED. REMOVED & REPLACED ATSU IAW AMM 46-21-34. OPS, & LOADS OK. ACFT OK FOR SERVICE. NO DEFECTS NOTED.