2558 - BCU FAULT DURING TRAIN PREP ~~~~~ 2558 BCU FAULT DURING TRAIN PREP.  2558 ER D/L & found FC 331/308/330. Replaced ACU. Brake cyclic test & brake pressure test - OK. No residue pressure at COAST. Limited movement/depot shunting - OK.  Sarma/Sugu/Kamarul/Anand/Lee PT 44910 #2558 ACU S/N : OLD : 1024/007 NEW : 1024/033