TIMS showed Fire Internal at car 1505. Staff(AMK) checked and confirmed no signs of fire on exterioror interior of train. Train was escorted to terminal statio n. ~~~~~ To check smoke detector and plaseal Check smoke detector and no water imgress plaseal on all car intact.For preventive measure replace smoke detector unit.Function check ok. #1505-smoke detector unit:- Not: 2481484 raise to CSC Done by Saini/Asruddin. 20/04/23 1505 TIMS showed Fire Internal. Staff(AMK) confirmed no signs of fire on exterior or interior of train. Train was escorted to terminal station.  1505 FC 721 registered once. During monitoring, no recurrance of fault. Opr 20 raised to check Smoke detector & plaseal. Celine 45034