IMDC - 3541: TC reported TIMS shows WSS ~~~~~ IMDC - 3541: TC reported TIMS shows WSS at axle 2. Track is dry BBT NB.  3541 checked TIMS & found multiple FC 322. Checked/measured tacho 1/2/3/4 - All OK. Dump v/v checked - OK. Replaced BCU. Security/function test - OK.  Alan/Anand 44898 #3541 BCU S/N : OLD : 1817006 NEW : 1815129