3516 TC reported having BCU bogie 2 faul ~~~~~ 3516 TC reported having BCU bogie 2 fault. Please check and rectify.  3516 fault code 308, 312, 331. Conducted brake cyclic found sign of slow release b1 to coast. ACU exhaust port having dragging air when B1 t coast. Replace ACU and function check ok. brake cyclic few time ok. KSFA DT ACU Old:1048-035 new:1034-012 Notif:2511012 Done Zulq/ Asruddin 45138