DT check found 1624 BCP coast at 1.40bar ~~~~~ DT check found 1624 BCP coast at 1.40bar     #1624 When put B1 to coast,ACU having abnormal knocking noise.Replaced ACU and carried out brakes cyclic/function check-ok. ACU-Old s/n: 1538-168  New s/n: 1549-173 Not: 2139584 raise to RSW. Done by Kumar/Jack/Sateesh/Koh. 10/03/20