TIMS showed Smoke Internal at car 1505.Staff(RFP) checked and confirmed no signs of smoke / fire / burning smell on exterior or interior of train. Train was es corted to terminal station. TIMS showed Smoke Internal at ca ~~~~~ * ,N * 'From TIMS FC-720, resettable Fault unable to duplicate in depot Checked and found 1505 smoke detector unit at no.1 & 2 end dirty - blow clean both ends smoke detector FRP checked no signs of water ingress, wire security ok DONE BY:AZLI/ZAIDI 22.09.2023