Train doors at rear M1 car were not proven closed. TC recycled train doors once - ok. Staff(BBT) che cked and confirmed Rear M1 B1 door jerky. Staff(BBT) isolate d rear M1 B1 train door at CCK SB in closed position. Train ~~~~~ T204 3609 Train doors at rear M1(1610) car were not proven closed. TC recycled train doors once - ok. Staff(BBT) checked and confirmed Rear M1 B1 door jerky. Staff(BBT) isolated rear M1 B1 train door at CCK SB in closed position.  No FC. Check and found 1610 B1(RHS) outer door roller damage and replace done. Push/Pull resistance, matting strip, Service clean Guide rail, Jrail ok. No FOD. Check DLS, DCS, DLD okay. Saloon door open/closed several times and static test okay. Done by Saini/Asruddin 45277