DT549: Undershoot ult timing: 1718hrs, 1956hrs, 2003hrs cation: OTP1, OTP1, CTH4 C no abnormalitiesLogs show BCP abnormal at DT Car eared on Signal side ~~~~~ CHECK AND FOUND FAULT CODE 330 FOR#1550 AND 327 FOR #3550.REPLACE TACHO GEN AT #3550 NUMBER 4 DONE.REPLACE TRANSDUCER AT #1550 BOGIE 1 IN BRAKE FRAME DONE.CONDUCT BRAKE CYCLIC TEST BRAKE FUNCTION NORMALLY.JIMMY/ZHENG YI/VICTOR 23.09.2021 TACHO S/N OLD 1249239           NEW 87066