3525 BCU Fault. To check & rectify. (Tra ~~~~~ 3525 BCU Fault. (Train Prep)  3525 found BCU fault. Replaced ACU. Checked no air leakage. Brake cyclic test - OK.  Alan/Shafie/Kamarul 44622 #3525 ACU S/N : OLD : 1306/053 NEW : 1037/019