Pax feedback to staff(YWT) that one of the train doors did not opened at car 1615. Staff(MSL) confir med and isolated the defective 'A3' doors at car 1615 in clo sed position at WDL SB. Pax feedback to staff(YWT) that one ~~~~~ Pax feedback to staff(YWT) that one of the train doors did not opened at car 1615. Staff(MSL) confirmed and isolated the defective 'A3' doors at car 1615 in closed position at WDL SB.     Found LHS door jam due to roller damage. Replace Both side saloon door iron roller done. Push/Pull force- passed. Door matting 64.2mm. Service/check and cleaning ok. Jrail, Guide rail, check no sign of FOD. No door rubbing mark.DLD rubber cushion ok, DLS red mark ok, DCS to plate ok. Door cyclic open/closed, Door static test ok. Done by Asruddin/Haslan 45347