Train stopped with stuck brake indication at Front DT car when entering JUR MT. STBS operated. Pax d isembarked at JUR MT. Train routed to OTP siding due to UPD all TBs closed for maintenance work. Staff DVR assisted to i ~~~~~ 3629 stopped with stuck brake indication when entering JUR. (L3) STBS operated. Pax disembarked at JUR MT. Train routed to OTP siding due to UPD all TBs closed for maintenance work.  3629 ER shows stuck brake at EM. FC 308/330/331 registered. 3629 ACU swapped with 3630. Replaced 3630 ACU. Tested brake operation - OK. Checked BCU & ACU connection - Satis. ACU 3629 1528-063 (old) 3629 1920-93 (after swapping from 3630) 3630 1543-184 (new) Alan/Sarma/Anand/Shafie 45089