TC reported arcing seen when departing SB HW. Arcing recurred at SOM and CTH SB. Train was the LVDT train. SM(BDL) monitored for few trains and confirmed no abn ormalities found. Train ended service at MSP SB. ~~~~~ Check underframe high voltage equipment ok. Found #1533 A1 CCD fuse blown-replaced ok. Further check found #1533 A2 and B2 CCD shoe flashover and minor surface found multiple area pitted. CCD shoe replace done. CCD shoe conduct meggaring to track ok. ER downloaded to PTU 007 and observed no propulsion fault. To be further monitoring in M/L. Done by Faddzal. 16/11/20. #3533/#1533 Check CCD fuse cable terminal, no sign of looseness. Megger surge arrester ok. Check #1533 earth cable found #1533 axle 1 and axle 4 earth cable from gear box earth brush cable lug deformation and cable exposed. 1533 Axle 1 & Axle 4 earth cables to replace. Done by Zulq/Din/Haslan. 17/11/20. 1533 #1 & #4 earth cable replaced done. Check and found T/M earth brush uneven wear 28mm/46mm. Replaced earth brush done. Limited movement done ok. Done by Sanip. 17/11/20.