TC reported 'A1' train doors in the Front DT car were not proven closed due to obstructed motion. TCrecycled train doors once - ok. Fault did not recur at subs equent stations. ~~~~~ TC reported 'A1' train doors in the Fron     Check Tims observed A1 door CLE FC023 occurred once.Check door mating strip gap 60.78mm out of criteria.Adjust to 63.19mm ok.J-rail & Guide rail no signs of FOD.Push/pull test 7kg ok.DCS 15.71mm out of criteria.Adjusted to 14.8mm for more positive contact.DLS red line ok.DLD cushion intact.After rectification door cyclic test 20x ok.Performed door cyclic test all doors timing within criteria. Done by Arthur Sam. 5/10/22