#1540 BCU Release Fault. To rectify (Tra ~~~~~ #1540 BCU Release Fault - BCP at 2.94bar. To rectify (Train Prep)     #1540-FC 308/312/330/331.Depot shut N .Brake cyclic ok from ACU.Only found air leak sound from silencer.Conduct accordingly Air leak flow chart.BC1 isolated,stop purging from BC1,isolated PBIC silencer stop air leak sound.Swap PBSV #1540 to #1539-ok.No air leak sound from silencer after normalise.Swap CPT #1540 to #3540 brake cyclic no abnormalities.Pneumatic shop advice #1540 replace new ACU and brake cyclic test ok.No abnormalities .BCP within spec.Depot shunting #1540 brake fault reoccured.To follow up check #1540. 0020 raise to follow up. ACU-Old s/n: 1019-019  New s/n: 1301-125 Not: 2316735 raise. Done by Saini/Haslan/Asruddin. 23/09/21 1540 Brake fault re-occurred FC308/330/331 during depot shunt #1540-EC 308/330/331.Fault duplicate in pit-#1540 BCP at 2.83bar EM pressure when at B3.Swap ACU and CP transmitter from #1540 to #2540.Fault transfered-2540 BCP at 2.8bar when at B3.Swap back CP transmitter from 2540 to 1540 fault remain 2540 BCP at 2.83bar and slow to release feom EM to B3.Changed out ACU from 2540.Brake cyclic BCP all within criteria and no slow to release.To further monitor on M/L. ACU-Old s/n: 1301-125  New s/n: 1301-122 Done Sanip/Faddzal. 23/09/21