#1539 BCU air suspension presssure fault ~~~~~ #1539 BCU air suspension presssure fault and air leak test fail during DT check to rectify.  539/540 conduct air leak test 0.5/5min cab occuppied and unoccupied. 1539 bcu suspension fault fc 315. Check MPV no air leak, 3 leveling valve able to inflate and deflate. Leveling valve no air leak, Air bag no sign of abnormality. ASP:3.04, individual bogie 1/2 3.17/2.99. Air spring height No shim, A1/B1 within criteria. A2/B2 fail adjusted to criteria. Swap ASPT 1539>2539 for monitoring. Side finding PBSV air leak and replace PBSV done. No air leak occurred. Check ACU no abnormalities. BCP ok. PBSV Notif:2546421 Done by Haslan/Zulq/Saini 45257