DT,#2517,0.19 BAR,WHEN PUT TO COAST,TO R ~~~~~ DT,#2517,0.19 BAR,WHEN PUT TO COAST,TO R     #2517 check brake BCP 0.148,Tims BC1 0.11/BC2 0.22.Check bogie 1 BCP 0.144,Bogie 2 BCP 0.726 when at coast check bogie 1 brake able to release bogie 2 brake unable to release when at coast.Isolate BC1,bogie 1 brake able to release isolate BC2 bogie 2 brake unable to release.Isolate saloon BIC brake at bogie 2 unable to release.Further check found B4 parking brake unit internal leak.Swap PBSV,B13 double check v/v to #1517 to no avail.Put to coast,PBIC isolated and check bogie 1 & 2 service brake able to release.Notification to RSW for #2517 B4 parking brake change out. #2517-B4 parking brake unit:- Not: 2412308 raise. Checked by Zulq/Saini/Haslan.  26/08/22