Train unable to achieve the target speed. the speed keep dropping to zero. TC checked and confirmed no fault indicates, TC proceed in ATPM all the way to BSD. T rain unable to achieve the target speed. the speed keep drop ~~~~~ T212 3603 Train unable to achieve the target speed. the speed keep dropping to zero. TC checked and confirmed no fault indicates, TC proceed in ATPM all the way to BSD.  #1603 FC309 BCU brake demand PWM Fault. From ER, 1603 brakes unable to release during propulsion, BCP high. 1603 brakes released after change to ATPM, able to propeol. Subsequently in AM able to propel as #1603 BCP ok. C/O BCY annd brake test ok. Powering check ok,all cars with power current. No powering related FC brake shoes checked ok. Wheel condition checked ok. STBS seal not broken. #1603 BCU brake demand PWM fault Old: 1509158 New: 1540262 Notif: 2596446 Done by: Jack and Koh. 07/05/2024