TC reported Fire External Alarm at FrontM1 car. Rear T235 line clear and feedback no signs of heat nor smoke on track. Staff (AMK) checked the train and feedba ck no signs of heat nor smoke in train. ~~~~~ TC reported Fire External Alarm at 1524  Found 1524 external smoke FSD FCB board rusted. Replaced new FSD. Function tested satis. New plaseal installed + cable gland. Done by Sanip,  Rizman, Firas. 17/9/2023