TC reported TIMS showed intermittent BCUBCP fault at front M2 car since BSH SB. TC feedback train p erformance - ok. ~~~~~ TC reported TIMS showed intermittent BCU     Check from Tims FC-308,330,331.Brake cyclic test observed BCP slow release.Further check ACU air leaking from exhaust port.Replace ACU and function test ok.BCP within cateria. ACU-New s/n: 1912-157   Old s/n: 1019-017 Not: 2268529 raise. Done by Sanip/Deeshan. 20/04/21