Train doors at car 2511 were not provenclosed. TC recycled train doors once - ok. Fault did not rec ur at subsequent stations. Staff(SIM) checked and confirmed train doors in car 2511 no abnormalities. ~~~~~ NO FOD DOORS ABLE TO OPEN/CLOSE SMOOTHLY NO SQUEAKING NOISE.FOUND 2511 A4 DOOR MANFOLD INTERMITTENTLY LEAKING.C/O MANFOLD.FUNCTION TEST,10/20MM TEST DONE OK .JIA WEI/AZHAR 06.04.2022