Train doors at car 3614 B4 door were notproven closed. TC recycled train doors once - ok. Fault did not recur at subsequent stations. Fault recurred at NOV SB. Staff(ORC) checked and feedback no abnormalities found. ~~~~~ 3614 B4 Train doors were not  proven closed. TC recycled train doors once - ok. Fault did  not recur at subsequent stations. Fault recurred at NOV SB.  3614 B4 door FC 996. FOD found: N Weather strip condition ok: Y Roller condition ok: N, 3614 B4 outer roller delaminated. Clean J-rail & guide rail: Y Door cyclic test 20x, DIR extinguish ok: Y, after rectification TIMS door static timing test pass: Y, after rectification Door lock switch red line flush: Y Door close switch actuating plate distance ok: Y Replaced 3614 B4 LHS outer roller.  Ahmad/Suhairi/Syairazi 45195