Train doors at front DT car A2 door wasnot proven closed. TC opened and closed a few times to clearfault. ~~~~~ 3628-A2 Train doors not proven closed. TC opened and closed a few times to clear fault.  3628 A2 saloon door checked for FOD - Not Found. Door open/close operation check, push-pull gauge check (range within criteria) & open/close doors timing check (within criteria) - OK. OPS 20 raised to follow-up.  Selvan/Anand//Lee PT/Alcus 43882 To continue rectification.  3628 A2 door FOD check - OK. Cleaned up both top/bottom rail to allow more smoother door movement. Push/pull gauge test & door gauge test - OK. Door open/close timing check - OK. Cleaned J-rail as preventive measure..  Alan/Alcus 43886