TIMS showed Smoke Internal at car 3556.Staff(AMK) checked and confirmed no signs of smoke or fire o n interior of train. Train was escorted to terminal station.TIMS showed Smoke Internal at car 3556. Staff(AMK) checked ~~~~~ 3556 TIMS showed Smoke Internal. Staff(AMK) confirmed no signs of smoke or fire on interior of train. Train was escorted to terminal station. CE : 3556 smoke internal 1 alarm reset - OK. no abnormality found.  3556 FC 720: smoke internal. Checked no.1 end smoke detector. No signs of dust and water ingress. Function check smoke detector - ok. No fault reoccurred.  Swapped SDR1 from 3556 to 1556. OPS 20 raised to check 3556 internal smoke detector.  Aliff/Daniel/Redzwan 45448 BSD: To further check on 3556 No. 1 End Internal Smoke Detector   #3556 checked and found no 1 end internal smoke detector sensor dusty. Cleaned with compressed air and checked PCB ok, no signs of rust or water ingressed. Function test ok. Done by: Saini, Morgan, Kumar (1/7/24)