TC feedback BCU at Rear M1 car boogie 1is unhealthy when train is stationary. ~~~~~ 1555-Download TIMS-FC-330,331,308. Perform Brake pressure check-Ok. Unable to duplicate fault. Brake cyclic check done with all pressure within criteria.Check ACU-No leak observed & Measured ACU solenoid valve reading within criteria. Found B2 parking brake unit leaking. Raise Noti to RSW to c/o.   Akhbar / Hairul / Ganesan / Jiawei. 26/08/2020. Noti to RSW-2193117. ACU-Solenoid valve reading-1.RC-1.36.                            2.RF-1.35.                            3.AF-1.42.                            4.EM-1.38.                            5.AC-1.44.