TIMS showed Smoke Internal at Front M2 car Staff(AMK) checked and confirmed no signs of smoke / fire/ burning smell on the interior of train at Front M2 car. R ear train, T223 did line clear and feedback no abnormalities ~~~~~ To check no.2 end smoke detector   Checked TIMS showed FC 722, 723, 731 for #2506 No. 2 end smoke internal detector fault. Further checks found #2506 #2 end smoke detector unit sensor to be dusty, serviced and cleaned with compressed air ok. Security check and function test ok. Done by: Saini, Din (6.3.24) TIMS showed Smoke Internal at Front M2 c