Train prep reported car 2529 having intermittent BCU fault.Brake pressure slow to release.(From EM to coast)Pls check and rectify. ~~~~~ Checked 2529 brake frame, ACU and pipings - No leakage. Brake slow to release intermittently. Replaced new ACU and function test OK. Static check OK. Brake release function OK. N.ASANKAR/25.01.22 --------------