Intermittent brake fault at Front M2. TCdid brake status check ok, no fault. TC feedback powering w as ok. ~~~~~ Intermittent brake fault at Front M2. TC     Check #2504 no fault code.But #2503 FC 308/330/331/312. #2503 brake cyclic test found slow release 0.52 bar.ACU air leak from exhaust port.Swap ACU to #1503 to confirm.Brake cyclic test confirm slow release.Replace ACU #2503 and function test ok.BCP within criteria.ACU no abnormalities. ACU- New s/n: 1012-015 Old s/n: 1024-007 Not: 2310597 raise to RSW. Done by Saini/Haslan/Asruddin.  02/09/21