Front DT car 'A4' train doors not provenclosed. TC opened and closed train doors once to clear faul t. ~~~~~ 3636 train doors not proven closed. Level 3 TC recycled doors few times to clear fault. ID: 2mins. L3 3636 A4 door FC 083. Checked & found LHS door leaf outer roller delaminated. Changeout new roller. Door gap 63mm. Door lock switch checked ok. Door resistance test ok. Door cyclic test ok.  Chan SW/Daniel/Aliff 45222