Station Ambassador feedback to station staff (CCK) that the train door at Door 19 did not open fullywhen at station platform. SA feedback it was one of the 2 t rains (T226, T214) that had departed from station. Staff (CC ~~~~~ Station Ambassador feedback to station s Check and found LHS door outer main rollers dislodged. Door roller c/o done,mating strip ok.Push/pull resistance 5.5~6 kg ok.DLS,DSS check ok.Door cyclic and static test ok.Both cab DIRBS seal no broken. Done by Koh/Sanip.  10/02/22