3543 brake fault train prep ~~~~~ 3543 brake fault train prep     #3543 from ER observed when EM to B3,BCP stuck at approx. 2.6bar.Replaced ACU and carried out brakes cyclic /function test ok.Check all cars BCP from EM to Coast within cateria ok. ACU--New s/n: 1037-017  Old s/n: 1016-001 Not: 2264928 raise. Done by Zulq/Din. 8/04/21