Train door at Front DT car A2 door not proven closed.Fault self clear. Staff(BBT) checked, no abno rmalities. ~~~~~ Train door at Front DT car A2 door not p     Check FC-043 CLE happen x3.Further check DLS and DCS ok.Push/pull 10~10.5kg mating strip ok.Remove door bracket observed both door have rubbing sound and RHS door roller slight wobbing.Remove both observed RHS door both roller rubber give way against bearing,replace ok ,found FOD stick at bottom.LHS door check ok.J-rail & bottom guide rail    ok.Door install and cyclic test ok.Door static test ok.Push/Pull 5.3~5.5 kg. Done by Sanip/Koh. 15/09/21