Train came to a gradual stop entering station platform with BCU fault at front DT car. STBS was oper ated for train to proceed. BIC was isolated by TC in MSP sid ing. ~~~~~ #3521-Based on ER logs, stuck brake occurred at car #3521 at approx. 2138 hr. FC 308, 312, 314, 330 and 331. No leaks was observed during brake cyclic test and brake pressure normal. AC solenoid v/v 1742/770 and AF solenoid v/v 1740/280. ACU was removed and replaced, brake cyclic test ok. Both AC & FC are Mod 3. ACU-Old s/n: 1250-099  New s/n: 1236-040. Done by Sanip/Hakim. 05/02/20.