Train doors at Rear M2 car were not proven closed. TC recycled train doors once - ok. Staff(KTB) che cked and confirmed no train doors abnormalities. Fault did n ot recur at subsequent stations. ~~~~~ 2526 Train doors were not proven closed. TC recycled train doors once - ok. Staff(KTB) confirmed no train doors abnormalities. Fault did not recur at subsequent stations. CE: 2526 All doors proven open and closed. Depot to check.  2526 B3 door found both door leaves vibrating during opening/closing of doors. Suspect door rollers delaminated. Performed the following checks : 1) FOD found: N 2) Weather strip ok: Y 3) Clean J-rail & guide rail: Y 4) TIMS door static test timing passed: Y 5) Door cyclic test 20x, DIR extinguish ok: Y 6) 10/20mm gague test pass: Y OPS 20 raised to check on vibration and roller condition.     Abdillah/Hairi/Faizal 45181 2526 to further check on B3 door. Suspect roller delamination.  2526 B3 door performed the following checks : 1) FOD found: N 2) Weather strip condition ok: Y 3) Roller condition ok: N, 2526 B3 LHS and RHS outer and inner      rollers pitted 4) Clean J-rail & guide rail: Y 5) Push/pull door smooth & no wobble: Y 6) Door cyclic test 20x, DIR extinguish ok: Y,                      after rectification 7) TIMS door static timing test pass: Y, after rectification 8) Door lock switch red line flush with surface for positive        latching: Y 9) Door close switch actuating plate distance ok: Y 10) Door gap (criteria 63mm+1.5mm): Y Replaced #2526 B3 both LHS and RHS outer and inner rollers. Function test door operation - OK.  Sarma/Kamarul/Shafie 12.09.2023