TC reported brake fault intermittently lighted up when in between station. Train performance - ok. ~~~~~ * ,N * 'Fault unable to duplicate in depot. From TIMS, FC 308 BCU Fault, 309 BCU Brake Demand PWM Fault, 314 BCU Control Pressure Fault, 328/329 BCU Emergency BCP Fault Bogie1/2, 330/331 BCU BCP Fault Bogie1/2 registered on car 1614. From ER, 1614 Bogie1/2 BCP fluctuating, causing BRER to energize and de-energize intermittently. From ER, 1614 Bogie1/2 BCP was fluctuating at time of fault. 1614 BCU was unable to regulate and control brake demand. BCU swapped from 2613 to 1614. New BCU installed at car 2613.  Checked ACU no air leaks found, measured solenoid valve resistance ok. Both STBS normalized and resealed. Brake cyclic test ok, all brakes able to apply and release. Limited movement and depot shunt ok. DONE BY:KUMAR/FAIZAL 06.01.2024