1534 / undershoot dershoot on 02/09/20 ent logs reflects BCP abnormally on 1534. s help to rectify. ~~~~~ 1534 / undershoot     #1534-During brake cyclic test found BCP having abnormal and ACU haunting at EM.Replaced ACU and brake cyclic test ok,BCP within criteria. ACU-Old s/n: 004-056  New s/n: 1032-039 Not: 2197837 Done by Henry/Koh. 08/09/20