TIMS showed Smoke Internal at car 1548.Staff(BGB) checked and confirmed no signs of smoke on exteri or or interior of train. Train was escorted to terminal stat ion. TIMS showed Smoke Internal at car 1548. Staff(BGB) chec ~~~~~ 1548 - TIMS showed Smoke Internal. Staff(BGB) confirmed no signs of smoke on exterior or interior of train. Train was escorted to terminal station. TIMS showed Smoke Internal at car 1548. CE checked:1548 smoke internal reset ok n fault cleared,  1548 FC 720 Smoke internal. Checked 1548 #1E smoke detector - No sign of water ingress/dust. OPS20 raised to check smoke detector. Preventively swapped SDR1 from 1548 to 2548 For further monitoring. Shaun 45244 BSD: 1548 To check no.1 end internal smoke detecto  1548 found no.1 smoke internal detector sensor dusty, Clean up and function test ok Done by Rizman/Sanip/Koh/Jack 21.11.2023