2539 TC REPORTED BRAKE FAULT. ~~~~~ 2539 TC REPORTED BRAKE FAULT.  2539 ER D/L & found FC 308/312/330/331 & stuck brake. Replaced ACU & function test - OK (refer to attachment for brake pressure reading). 2539 ACU S/N :       OLD                   NEW                    1042/072              1019/017 AC  :              1909/787              1851/385 AF  :              1909/898              1932/224 EM  :              1902/989              1751/817 RC  :              1902/605              1902/696 RF  :              1902/604              1902/534  Aminur/Isamuddin    43919