Rear DT car 'B1' train doors not provenclosed. TC opened and closed train doors 3 times - ok. Staff(TAP) monitored the opening and closing of the affected doo r and feedback no abnormalities. ~~~~~ 3508 'B1' train doors not proven closed. TC opened and closed train doors 3 times - ok. Staff (TAP) monitored the opening and closing of the affected door and feedback no abnormalities.  3508 B1 LHS door wobbling. Found LHS both roller damaged - Replace with new rollers. Function test - OK. FOD found: N Weather strip condition ok: Y Roller condition : spoiled and replace with new rollers Clean J-rail & guide rail: Y Door cyclic test 20x, DIR extinguish ok: Y TIMS door static timing test pass: Y Door close switch actuating  ok: Y  Daniel/Redzwan 45439