TC reported Internal Smoke at FDT car .Staff(PYL) checked and feedback no sign of smoke or heat. ~~~~~ TIMS showed that smoke internal alarm triggered once on 3550 (resettable) Checked fire panel - no abnormalies or signs of water ingress. Cleaned smoke sensor sampling pipe via compressed air. Further monitored 1 hr - no fault recurrence. N.A/sankar/azli/arun/04.08.22