Intermittent BCU timer 2 fault. Train performance normal ~~~~~ 3686 Intermittent BCU timer 2 fault.
 Check FC 323/327(Speed Probe 4/WSP timer 2) Multiple times. Further check found Tacho gen 4 resistance fluctuating. Change out ok.
Due to multiple occurrences, swap BCU from 3685 to 1685 for further monitoring. Brake cyclic ok.
BCP within criteria and dump valve test ok.

3685 tacho gen 4: Old:   NEW: 9928026.
Notif rsw: 2319329.
Done by koh/sanip/faddzak. 02/10/2021.