3680 - FOUND BCU FAULT DURING DT CHECK ~~~~~ 3680 FOUND BCU FAULT DURING DT CHECK.  3680 checked/found FC 301 (BCU COM FAULT). Further checked from ER & found BCU faulty. Replaced BCU. Normalised BIC & resealed STBS. Brake cyclic test & no residue pressure at COAST. Limited movement/depot shunting - OK.     Sarma/Anand 44906 #3680 BCU S/N : OLD : 14-31-021 NEW : 15-21-206