Train doors at rear M2 car B3 door werenot proven closed. TC recycled train doors once - ok. Staff( SBW) checked and confirmed ~~~~~ Train doors at rear M2 car B3 door were   Check the above mention reported found #2603 B3 door outer (RHS) roller damaged, replaced ok. Checked DLS, DCS, DLD, door rubbing mark, FOD and clean J-rail, guide rail. Also check push/pull resistance and mating strip ok. Door open/close several times and static test ok. Done by: Saini, Asruddin. (15/7/23)