Train door at car 2530 B1 door were notproven closed. TC recycled train doors once - ok. Staff(CTH)checked and confirmed no train doors abnormalities. Fault d id not recur at subsequent stations. Train door at car 2530 ~~~~~ 2530 B1 train door were notproven closed. TC recycled train doors once - ok. Staff(CTH) confirmed no train doors abnormalities. Fault did not recur at subsequent stations. CE : 2530 B1 door proven open and closed. No fault.  2530 performed the following checks : FOD found: N Weather strip condition ok: Y Push/pull door smooth, no wobble: Y Clean J rail and guide rail: Y 10/20mm gauge test pass: Y Manifold/Actuator leaking: N TIMS door static timing test pass: Y Postulate FOD dislodged. Side finding found  #2530 B1 LHS inner roller slight pitting, replaced roller.  Aliff/Daniel/Redzwan 45329