3539 - BCU FAULT. TO CHECK & RECTIFY. ~~~~~ 3539 - BCU FAULT.  3539 FC:308  BCU Fault, FC 330/331 BCU BCP fault bogie 1 & 2. ER found BCP abnormalities. Swap #3540 ACU to #3539 and replace #3540 with a spare ACU. Brake cyclic check - ok. No air leak on the solenoid valve, and the brake was able to physically release on COAST. Brake pressure was within the criteria. No residual pressure in COAST. Limited movement and  depot shunting ok. No fault reoccur. After Swapped and replace s/n no: #3539 - 1311/057 #3540 - 1034/011 (new) #3539 - 1236/040 (old)  Sarma/Lee PT/Anand 45442