TC feedback intermittent wheel slip slide (dry track). ~~~~~ TC feedback intermittent wheel slip slid     During shunting found #3547 axle 1 having W/S/S Replaced BCU and carried out function test ok. 0020 raise to c/o #3547 Tachogen-#1 axle. Done by Kumar/Jack/Koh. 10/01/20 BCU-New s/n: 1312-094  Old s/n: 1312-090 #3547 To replace tacho gen no.1 33547 Replaced axle 1 Tachogen and function check ok during depot shunting-No W/S/S. Done by Jack/Koh. 12/01/20 Tachogen-Old s/n: 1502412  New s/n: 0010060