Pax feedback to staff(YIS) that train doors at Front M2 car 'A1' door was jerky when train doors wer e closing. Staff(SBW) checked and confirmed no abnormalitiesfound with train doors. ~~~~~ 2604 - To Check A1 Door Outer Roller Condition.  2604 A1 door conducted open/close door operation - OK. Swapped DCP from #2604 A1 to #2604 B4 as preventive measure. Security/function check - OK.  Aliff/Redzwan 45197 DCP S/N : (after swapped) 2604 A1 : 1405W020041S017 2604 B4 : 1405W020041S018 2604 Pax feedback to staff(YIS) that A1 train doors was jerky when train doors were closing. Staff(SBW) confirmed no abnormalities found with train doors. CE Found 2604 A1 door no jerkiness. Depot 2604 A1 train door operational check.  2604 A1 door No FC. FOD found: N Weather strip condition ok: Y Roller condition ok: Y Clean J-rail & guide rail: Y Door cyclic test 20x, DIR extinguish ok: Y TIMS door static timing test pass: Y Door lock switch red line flush: Y Door close switch actuating plate distance ok: Y OPS 20 raised to follow-up.  Jonathan Koh 45197