3552- BCU FAULT DURING TRAIN PREP ~~~~~ 3552- BCU FAULT DURING TRAIN PREP     Replaced ACU on #3552 done. Secure check ok.Aux on train check no air leak.Conducted brake status ok able to acheived zero,no abnormalities found. ACU- Old: 12-90-46 New: 12-49-045 Done by Kana/Sukris 15/06/22