2546- BRAKE FAULT DURING TRAIN PREP. ~~~~~ 2546 - BRAKE FAULT DURING TRAIN PREP.  2546 found intermittent braking pressure during brake cyclic test. Replaced ACU at #2546 & no leakage found after replacement. Refer to attachment for brake pressure reading. Depot shunting & no brake fault recurrance. #2546 ACU S/N : OLD : 1032/043 NEW : 1019/019  Lee PT/Shafie 44364