TC reported smoke external at front M2 car. Staff (AMK) checked and confirmed, no abnormalities .T23 0 line clear, and feedback no abnormalities. TC reported smo ke external at front M2 car. Staff (AMK) checked and confirm ~~~~~ 2523 TC reported smoke external. Staff (AMK) checked and confirmed, no abnormalities. T230 line clear, and feedback no abnormalities. TC reported smoke external at front M2 car.  2523 FC 721 (Smoke external) Found no gasket & water inside terminal side of smoke detector.    Raised OPS 20 for smoke detector c/o.  Alan/Kamarul/Anand/Sugu 45335 BSD: 2523 To replace No 2 End smoke detactor   OPS20: #2523 found smoke detector unit to be rusty. Replaced external smoke detector unit with cable gland and plaseal. Function test ok. Notification to CSC: 2576804 Done by: Koh, Rizman, Sanip (4/3/24)