3524 having Encoder fault & All cars hav ~~~~~ 3524 having Encoder fault & All cars having BCU Brake Demand PWM fault.  3524 Encoder Fault, FC 208,207, 201. Replaced Encoder. Brake cyclic test ok. Refer to S&C for 6 cars PWM fault. Notification 2558319.  Aliff/Redzwan 45298 #3524 Encoder S/N : OLD : 1007-010 NEW : 1007-002