#3520 BCU fault(Train Prep) ~~~~~ CHECKED TIMS FC 308,312,331,330.SWOP #3520 ACU WITH #3519 PERFORM BRAKE TEST FAULT TRANSFER.REPLACED ACU WITH SPARE #3519 AND PERFORM BRAKE TEST FAULT DID NOY OCCUR.MONITOR FOR 1 HOUR OK.GANESAN/ SIR/HUSSIEN/VICTOR 28.09.2022