TC reported train doors at car 3618 didnot opened. Staff(BGB) checked and confirmed no train doors abnormalities. Fault did not recur at subsequent stations. ~~~~~ 3618 TC reported train doors did not opened. Staff(BGB) confirmed no train doors abnormalities. Fault did not recur at subsequent stations.  3618 A2 door replaced LHS outer roller due to delaminated. Checked/cleaned J-rail/guide rail, weather strip condition - OK. Function test door operation - OK. No FOD was found. TIMS static door timing & door gap 63.9mm - OK. No DIR light up when doors were closed.  Alan/Kamarul/Shafie/Lee PT/Sugu 45093