1541 Brake Fault. To check & rectify. (T ~~~~~ 1541 Brake Fault.(Train Prep).  1541 ER D/L & found FC 331/330/308. Performed brake cyclic test & #1541 brakes unable to release. Replaced ACU. Security/function test - OK. #1541 ACU S/N :    OLD : 1019/019 NEW : 1301/123  Aminur/Isamuddin 44197