Train undershoot platform by 1.9 metresin Auto mode. Proceeded in ATPM mode to the headwall. Train undershoot platform by 1.9 metres in Auto mode. Proceeded inATPM mode to the headwall. ~~~~~ Train undershoot platform by 1.9 metres     Tims no observed no BCP FC related.Brake function test ok,no slow release.BCP within criteria. Checked ER Train arrived at station undershoot at 19:11:18 in AM mode to ATPM at 19:11:53. Doors opened at 19:12:16 from LDC and ATS,determed station was at Jurong station,train did under run. From ER ound abnormal BCU pressure at #2527 slow to release while approaching station at slow speed just before stop.\ ops 0020 to check ACU and brake at #2527. Checked by Sanip/Koh/Luke.  24/03/23 ER show car 2527 brakes slow to release. To check ACU and brake functions. #2527 swap ACU #1527.During function test found RF solenoid v/v hunting.Replaced new ACU and function test,brake cyclic test ok.BCP    within criteria. ACU:- Old s/n: 1008/006 New s/n: 1042/073 Not: 2473735 raise to CSC Done by Zulq/Saini/Haslan. 24/03/23