Train doors at car 2606 were not provenclosed. TC recycled train doors once - ok. Staff(CCK) boarde d the train and confirmed train door at car 2606 'B3' opened5cm and closed while departing station in Auto mode. No EB ~~~~~ Train doors at car 2606 were not proven     Check and confirm #2606-B3 LHS outer door roller damage-c/o.Mating strip/Push/Pull,DLS red line,DSS,Door function and    door static test ok. Done by Sanip/Koh. 27/05/23