Original TC feedback to step in TC thatRear DT B2 door obstacle detected indication lit. Staff (DBG ) confirmed no abnormality. ~~~~~ Original TC feedback to step in TC that Rear DT(3629) B2 door obstacle detected indication lit. Staff (DBG) confirmed no abnormality. CE checked 3629 B2 door Isolated and Sticker Pasted.  3629 B2 fault code 956. Found RHS door outer roller damage. Replace both LHS/RHS iron roller. Push/Pull resistant passed. Matting strip passed. Service guide rail/Jrail done. No FOD. Check DLS, DCS to pate, DLD rubber cushion ok. Door cycic and static test passed Done by Saini/Haslan 45258