TC report TIMS showed internal smoke alarm at front DT car. Staff (TAM) check and feedback no heat a nd no smoke. ~~~~~ TC report TIMS showed internal smoke ala   Checked TIMS confirmed 3504 smoke internal. Check fire panel found no signs of water ingress. Cleaned sensor on both end with compressed air. Reset and monitor and found no recurr. N.A/KUMAR/16.07.21 -----------------------