Stuck btake fault at front M1 car . STBSoperated. Proceeded in ATPM to BGB2 for disembarkment. ~~~~~ L3 1614 ER D/L & found FC 330/331/308. Confirmed stuck brake. Replaced 1614 ACU. Swopped 1614 ACU to 1613. Brake pressure test - OK. 1614 ACU S/N : OLD : 1439/027. NEW : 1442/040.  Goh AT/Alan. 25/03/2020.