1680- BRAKE FAULT ~~~~~ 1680 BRAKE FAULT.  1680 found FC 308/312/314/330/331 & TIMS indicated BRAKE fault. Residual pressure of 2.2 bar at COAST & unusual ticking sound from ACU but no leak found. Replaced ACU - Done. Function test & brake pressure test - OK. No residual pressure @ COAST. Limited movement/depot shunting - OK, no fault recurred. 1680 ACU S/N : OLD : 1549/220                         NEW : 1538/154 RF  : 1749/332                         RF  : 1845/248 RC  : 1748/128                         RC  : 1902/737 AF  : 1744/292                         AF  : 1851/498 EM  : 1742/110                         EM  : 1902/897 AC  : 1742/120                         AC  : 1909/906 (Mod 3)                                (Mod 4)  Sarma/Redzwan 43888