TC reported TIMS show intermittent BCU fault at front M1 car. TC feedback train performance - ok. ~~~~~ 1615 TC reported TIMS show intermittent BCU fault. TC feedback train performance - ok.  1615 found having intermittent fault. ACU replaced - Done. Function test - OK. 1615 ACU S/N : OLD : 1403-001 NEW : 1504-032  Chan SW/Hanafi 43851