TC reported intermittent BCU fault at the Rear M2. TC performed brake status check at BBT SB and con firmed fault at Rear M2 car. Fault self-clear when fault dep art station. TC feedback that train able to achieve target s ~~~~~ TC reported intermittent BCU fault at th     #2509-Found ACU solenoide v/v inner left side leaking.Replaced ACU done brake function test ok and no leakage. ACU- Old s/n: 1047-082 New s/n: 1008-008 Not: 2463053 raise. Done by Koh. 17/02/23