Intermittent BCU fault for 3 consecutivestations while train is moving. Train performance - ok. ~~~~~ 2536 Intermittent BCU fault for 3 consecutive stations while train is moving. Train performance - ok.  2536 ER D/L - Done. Replaced ACU. Function test - OK. No residue pressure at COAST. Brake cyclic test & limited movement - OK. 2536 ACU S/N : OLD : 1019/012 NEW : 1311/148  Sarma/Anand 44102