TIMS showed BCU fault (intermitten) at car 1567. Train performance - ok. ~~~~~ TIMS showed BCU fault (intermitten) at c     #1567 fault code 308,312,330,331.Check and found #1567 BCP slow release from B1 to coast.Further check found ACU abnormal air purge from exhaust port.Replace ACU and function check ok,BCP  within range.Additional finding,constant air purge from brake frame,swap B13 card from #1567 to #2567 to no avail.Swap PBSV from #1567 to #2567 fault transfer.Constant air purge at brake frame #2567.Replace #1567 PBSV ,#2567 PBSV place back the PBSV functional check ok. #1567 ACU- Old s/n: 1037/055 New s/n: 1302/132 Not: 2466146 raise to CSC #1567-PBSV- S/N-  Not: 2466148 raise to CSC Done by Saini/Zulq  28/02/23