TC feedback TIMS showed "Obstacle detected at RDT" while departing UPD-RT2. But TC did not see or he ar any abnormalities. T412 feedback no abnormalities while d eparting UPD RT2 ~~~~~ Check Tims observed #3513 having 1 time 740-obstacle detected, after self cleared. During depot shunting no observed any obstacle detect. Further check #3513 A & B side obstacle detector height out of criteria (43-45mm). Readjusted to 53mm ok. Check wiring all insulation ok and no sign of rubbing mark on connector. No obstacle detect fault recurrence. ODR check ok. Checked by Sanip/Koh. 09/7/21.