Train door at rear DT "A1" door not proven closed. Step out TC pushed closed rear DT "A1" door for t rain door to depart. ~~~~~ #3527 A1 door replaced roller on both door. Door running smoothly. Function check ok. Clean J-rail and guide rail ok. 10/20MM gauge  test ok. Door cyclic test 20x DIR extinguih ok. Tims door stste timing test pass ok.  Sridhar / Surendar / Firdaus 06.09.2023