3539 Reported having BCU fault.    ~~~~~ 3539 Reported having BCU fault.  3539 ER D/L & found FC 307/301 BCU fault. Swapped #1539 BCU to #3539 & replaced new BCU at #1539. Performed brake function check - OK. Wheel diameter setting - Done. Brake cyclic test & no residue pressure at COAST. All brakes able to release on demand. Limited movement/depot shunting - OK.  Anand/Lee PT/Shafie/Sarma/Sugu 45013 BCU S/N : #1539 : 1816142 (NEW)       : 1833215 (OLD, from #3539) #3539 : 1830803 (from #1539)