Train doors at rear DT cars were not proven closed. TC recycled train doors a few times but to no av ail. Staff(LKS) reported train doors at rear DT car 'B4' doo rs were not proven closedDIRBS was operated for train to p ~~~~~ REPLACED ROLLER AT 3501 B4 RHS DOOR.LHS DOOR RUBBER STRIP REINSERTED TO CORRECT POSITION.DOOR CYCLIC TEST 20TIMES OK.10/20MM DOOR GAUGE CHECK OK .VICTOR/RAGHU 11.04.2022  FAULTCONFIRMED.TRAIN DOORS WERE U BLE TO CLOSE AT B4 IN 3501.RUBBER STRIP OK.NO FOD.REMOVE DOOR AND FOUND ROLLER DAMAGED ON RHS DOOR.SIDE FINDING LHS DOOR RUBBER DISLODGE AT THE TOP BUT NOT AFECTING DOOR MOVEMENT.OPS20 TO CHANGE OUT DOOR ROLLERS ON RHS DOOR,RECTIF RUBBER AT LHS DOOR.SRIDHAR 11.04.2022