TC reported stuck brake at front M2 car.TC switched to ATPM mode. Fault self cleared. TC conduct br ake status check at DBG NB - confirmed ok. TC reported stuckbrake at front M2 car. TC switched to ATPM mode. Fault self  ~~~~~ TC reported stuck brake at front M2 car.   Check #2603 TIMS FC-330, 314, 312. Found BCU release fault. Confirmed with ER readings BCP for 2603 unable to release on one occurrence. Replaced ACU and conducted brake cycle test ok. Depot shunting ok, no occurrence of stuck brake. Notification to CSC: 2622001. Done by: Kumar, Saini (29/7/24)