1641- BCU FAULT (FC:301,307&308) DURING ~~~~~ 1641 - BCU FAULT (FC:301,307&308) DURING TRAIN PREP.  1641 D/L ER & found BCU faulty. Replaced BCU & wheel diameter set. Brake cyclic test & function test - OK. Limited movement & no fault reoccur. #1641 BCU S/N : OLD : 1825-082 NEW : 1815-138  Sarma 44234