What was found
STRONG SMELL OF SOMETHING BURNING JUST BEFORE PUSHING FROM GATE . BRAKE SYSTEM 2 FAULT AT SAME TIME. INSPECTED AND FOUND NR 2 BSCU INOPERATIVE, REMOVED & REPLACED THE NR 2 BSCU, OPS CHECKED GOOD IAW AMM 32-42-34-401, ACFT OK FOR SERVICE.