DT check found 1663 BCP 0.16. To rectify ~~~~~ DT check found 1663 BCP 0.16. To rectify     Check and found #1663 BCP remain at 0.16bar at coast.Further check brake frame observed ACU solenoid v/v exhaust port abnormal purging .Swap ACU to #2663 fault transfer.Proceed to c/o ACU and function test ok.BCP all within criteria. #1663 ACU-Old s/n: 1516-102  New s/n: 1434-018 Not: 2298682 Done by Sateesh/Koh. 26/07/21