3625 Train doors were not proven closed. ~~~~~ To continue rectification  3625 A1 door fault trace show door reopening motor current abnormal. Door re-opening width not within criteria. Postilate encoder intermittently faulty as DCP was previously swapped with #3625 B1 door on 24th October 2023. Replaced door operator. Security/function test - OK.  Celine 45253 #3625 A1 Door Operator S/N : OLD : 1608W020021S027 new : 1412W020021S037 3625 Train doors were not proven closed. TC recycled train doors once - ok.  3625 A1 door Performed the following checks : 1) Check history DCP swapped before & date: DCP last swapped on     24 Oct with B1 door. 2) Check fault code: FC 023 (door close operation timeout) 3) Download ER & Fault Trace: TC cycled doors once to clear            fault. 4) FOD found: N 5) Removed door checked roller condition ok: Y 6) Clean J-rail & guide rail: Y 7) Push/pull door smooth & no wobble: N 8) Door cyclic test 20x, DIR extinguish ok: Y 9) TIMS door static timing test pass: Y 10) Door lock switch red line flush with surface for positive        latching: Y 11) Door close switch actuating plate distance ok: Y OPS 20 raised to follow-up.  Aliff/Daniel/Redzwan 45253