DT521/522: UNDERSHOOT 3 TIMES 521/522 REPORTED UNDERSHOOT 3 TIMES. RS LOGS INDICATED BCP NORMALITIES AT TIME OF INCIDENT. PLEASE KINDLY FOLLOW-UP. THANK YOU. ~~~~~ Performed brake function check and found SATIS. Checked TIMS and no fault was recorded. ER shows 152 abnormal brake pressure during fault occurrence. N.AKUMAR //16.08.21 ------------------------ To replaced 1522 ACU and function check   . 1522 ACU replaced. Function check found SATIS. To be further monitored on ML    N.AHASZHAN //16.08.21 ------------------------