TC reported train doors at Front M2 'A4'not proven closed, recycle once - ok. Staff (Nov) checked a nd confirmed no abnormality. TC reported train doors at Fron t M2 'A4' not proven closed, recycle once - ok. Staff (Nov) ~~~~~ 2508 TC reported A4 train doors not proven closed, recycle once - ok. Staff (Nov) checked and confirmed no abnormality.  2508 A4 door performed the following checks : FOD found: N Weather strip & roller condition ok: Y Checked roller condition ok: N, A4 LHS outer roller pitted Clean J-rail & guide rail: Y 10/20mm gauge test pass: Y Push/pull gauge test pass: Y, after rectification    Manifold & actuator leaking: N Door cyclic test 20x, DIR extinguish ok: Y, after rectification TIMS door static timing test pass: Y, after rectification Door magnet valve no residue voltage when closed: Y Replaced #2508 A4 LHS door outer roller. Function test door operation - OK.  Aliff/Daniel/Redzwan 45296