2567 - BCU FAULT (TRAIN PREP). TO RECTIF ~~~~~ EMM TO FURTHER EXPLAIN.  2567 ER shows BCP stuck at B3, unable to release. No leakage found at ACU when brake cyclic test from COAST to EM. Swapped BCU from #1567 to #2567 & replaced new BCU at #2567. (As done during OPS 10).  Celine Tan 45008 2567 BCU FAULT (TRAIN PREP).  2567 as instructed by EMM : Swapped BCU from 1567 (old S/N:1826107) with 2567 (S/N:1834244). Replaced new BCU at 2567 (new S/N: 1815139). Security/Function test - OK. Wheel diameter adjusted. OPS 20 raised to follow-up.  Isam/Fudail/Faiz/Izzul/Azmi 45007