DT502 UNDERSHOOT 502 REPORTED UNDERSHOOT @1834HRS, 0853HRS AND 1123HRS. FROM RS LOGS WE SCOVER THE BRAKING ISSUE PLS LOOK INTO IT ~~~~~ DT502 UNDERSHOOT     Check and found #3502 ACU solenoid v/v hunting. Replace ACU and function brake test ok. ACU-Old s/n: 1025-008  New s/n: 9948-045 Not: 2125235 raise to RSW. Done by Jack/Koh. 29/01/20