Train doors at car 1617 were not provenclosed. Staff(MRB) checked and confirmed that car 1617 'B3' door not proven closed. Staff(MRB) assisted to isolate the d efective pair of train doors for train to depart. ~~~~~ Train doors at car 1617 were not proven closed. Staff(MRB) checked andconfirmed that car 1617 'B3' door not proven closed. Staff(MRB) assisted to isolate the defective pair of train doors for train to depart. (L3) (Level 3). L3 1617 B3 door (LHS) wobbly and slight stuck due to outer roller faulty. Fault code 973,976. Afer roller replace check push/Pull resistance pass, mating strip pass. Conduct normal checka and cleaning done. Jrail, Guide rail check for FOD any door rubbing mark ok. Check DLS,DCS and DLD ok. Door opening/closing timing static test pass. Done by Haslan/Asruddin 45098