DT3567/3568: Undershoot in AMDT3567 encountered the above symptom X3 (2017hrs/ TAP2, 2215hrs/ KRJ2 and 2246hrs/ TAP2). Event record analysis show BCP abnormal during fault time on DT3567 at 2215hrs. LDC analysis show brake blending symptoms during all fault timing. Please investigate and follow up, thanks. ~~~~~ 3567/3568: Undershoot in AM. DT3567 encountered the above symptom X3 (2017hrs/ TAP2, 2215hrs/ KRJ2and 2246hrs/ TAP2). Event record analysis show BCP abnormal during fault time on DT3567 at 2215hrs. LDC analysis show brake blending symptoms during all fault timing. Please investigate and follow up, thanks.  567/568 physically checked the brake shoes & brake operation - OK. No air leak was found. Brake pressure for all cars checked - OK. Performed depot movement & found #2568 BCU fault. OPS 20 raised to follow-up due to time constraint.  Wong/Anand/Rasul/Kiran 44403 To follow up.  2568 BCU replaced & swapped brake frame transmitter to #2567 for monitoring. Function check & brake cyclic check - OK. #2568 BCU S/N : OLD : 1827114 NEW : 1815133     Chan SW/Hanafi 44404