TC reported train doors at car 1609 'A1'door did not open. Staff(SBW) checked and confirmed no trai n door abnormalities. Fault did not recur at subsequent stat ions. ~~~~~ 3609 - TC reported train doors at car 1609 'A1' door did not open. Staff(SBW) checked and confirmed no train door abnormalities. Fault did not recur at subsequent stations. CE checked:1609 A1 door stuck halfway.  1609 A1 door wobble and stuck due to LHS outer rolller damage fault code023, FOD ok. Repalce LHS door roller 1609 A1 Door Push/pull resistance pass. Do normal check and servicing done. Jrail and guide rail check FOD ok. Door rubbing mark ok. Door opening and closing    several time and static test pass Done by haslan/Asruddin 45152