Train encountered power fault at rear M1car while arriving station. Uable to reset at BGB2, CCK2 an d YWT2. SM (WDL) assisted to trip PRCB to clear fault. ~~~~~ Train encountered power fault at 1690 car while arriving station. Unable to reset at BGB2, CCK2 and YWT2. SM (WDL) assisted to trip PRCB to clear fault. (x3)  Found FC 143 (Propulsion K2 Failure), FC 820 and 821 (inverter 1 and 2  failed to deliver power). Replaced the K2 contact. Further checked charging resistors, K1, L1, L2, INV1, INV2, BCH, CCD fuse and height. Limited movement and depot shunting ok. K2 contact Old S/N: 1043666 New S/N: 122685 Notif: 2528802 Done by: Saini/Haslan 45201